As far as I know only the BMW brand battery charger will work through the power socket. 2008. My LT was not Canbus sensitive. I think the + is good for AGM batteries like the R1200RT has. Turn off the R1200 and leave it there. Search Advanced search. Started my lady up on a 20 degree morning over the weekend, probably just to hear the purr of her boxer motor. CerviperusAugust 15, 2008 in Hexheads. Since I only use the bike on weekends I keep the battery charged by using a Battery Tender. The same with the Miata lol. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, reviews, and more! I'm an old Beemer but new to the 1200RT, so there may be more newbie questions to follow. You're in the scene, not just watching it anymore, and the sense of presence is overwhelming., A battery is doing one of two things either discharging or being charged regardless of how new or old the technology or the bike is. The only difference is that the manufacturer has ensured that a sufficient amount of acid is the battery to sustain the chemical reaction under normal use throughout the battery warranty period. If your primary concern is the battery holding a charge for a month or so, you can probably get by without one. Free 2-Day Shipping - No Sales Tax (outside NV) - 60-Day Returns - Original OEM BMW Motorrad - Authorized BMW Dealer - Secure Online Shopping - Price Match Guarantee - Worldwide -We Specialize in Customer Service. Superior starting power. (opens in new window), Check out the Bob's BMW YouTube channel! IMHO nothing can be damaged by doing it. As long as you don't try to start the bike while connected to the tender you should be good. Got on my other bike, and went for an extended ride. Wend dead after sitting too long. If I use a generic battery tender not designed for the BMW canbus, will it destroy the onboard computer of the bik, Thanks. Pigtail SAE connector to the battery and any standard battery tender works. Shop the best {0} for your motorcycle at J&P Cycles. You need something directly wired to the battery, whether it is a SAE plug like most chargers have with a 15 amp fuse in line so you can use it for other stuff or a DIN receptacle you install your self. This is probably the most sensitive cell in terms of adverse reactions to over-voltage charging. Unless they've changed the socket, you'll need the adaptor for any accessory (such as the Cycle Pump) designed for a conventional auto cigar lighter socket. Thanks guys. You can leave it hooked up. Safe and secure wire routing. Zero issues with zero batteries disconnected. No problems at all. They work great an save several pounds. Damage to the motorcycle's electronics. The CMS sits outside so I worry about its battery. This topic is now archived and is closed to further replies. $94.99 . The only thing my $10.00 charger does not do is shut itself off when the battery is fully charged. JavaScript is disabled. Andto add some more confusion for you Noel, you need to use a smart motorcycle charger. Optimate is a good brand or Extream, there are others. Call us toll free:(855)763-7455. Redbrick I saw your post in another thread, and I like that idea. FREE delivery Wed, May 31 . Battery Tender for R1200RT. Shop high-performance AGM, Xtreme AGM and conventional flooded options. Zero issues with zero batteries disconnected. In my experience, letting a battery go dead drastically shortens their useful life. It doesn't know what type of battery is installed in it and treats all of them the same. Chargers noted here can safely charge FLA, AGM and GEL un-installed batteries. BMWLT.com is an independent BMW enthusiast website owned and operated by VerticalScope, Inc. Thanks. (opens in new window). I turned the key on, and read the voltage at the powerlet socket, 11.2 volts. Liquid absorbed into mats. Typical absorption voltage range 14.0 to 14.2 volts, typical float voltage range 13.5 to 13.8 volts. 1986 Yamaha FJ600, 2002 Honda VTX 1800C, 2006 BMW R1200RT, 2009 BMW K1300GT. I have 4 bikes, all in running status. Pure lead. Ever since then if it isn't running, it's on the tender. Bob's is committed to providing exceptional BMW motorcycle batteries and other essential supplies and electrical system parts in a way to help enthusiasts spend less time searching for what they need and more time riding. NOT for bike related questions. Shop products from small business brands sold in Amazons store. Safely charges 2004 and earlier motorcycles through the accessory socket. This replaced my 1996 R1100RT. I felt that my starts were getting a tad sluggish so I bought the Ultimate-4 to condition my battery and hopefully extend it's life a bit. Turned the key back on, plugged the charger in to the bike, and turned the key off. It will definately void the warranty. Then shut off (the green light stayed on) and then NEVER come on again. I have several battery tenders and a special BMW charger for my 2004. I rode my speedtriple for an hour, stopped for fuel and the battery died when I tried to restart the bike, had to get a new battery, it's perfect now. So, I wonder now if I need this special power adapter for my BMW (very expensive) battery charger and also my CyclePump Unit. Cost effective. I had my dealer install another plug on the right side of the tail piece and hooked it directly to the battery. I've used the optimate for many years, only as a small charge so won't harm canbus. My equivalent won't supply any voltage to the leads until it senses the presence of a battery. Optimate 3 won't work with canbus. For the WetHead series of bike, we are limited in the type/size of battery that will fit into the location provided, specifically 6 x 3 7/16 x 6 3/8 inches, or 150x87x161mm (LxWxH). Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, reviews, and more! By Probably not, but it doesn't hurt anything to try. Works just fine. I'm sure they don't all work in that manner but mine does! I cannot find a listing of its dimensions. Or do they do a better job managing the battery charge state on their own now? Now, fit the new seal into the gap between the end of the crankshaft and the engine block. Battery Tender Plus hooked to the battery with a Gerbings heated jacket harness has worked fine since 2005. : Sun Jun 09, 2019 8:31 pm. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 72. +1 on the direct connect to the battery. BMW Battery 12V-19AH Sealed GEL (3" deep), WestCo Battery 12V-22AH (3" deep) Sealed AGM, Odyssey Battery, 12V Sealed AGM (3" deep), WestCo Battery 12V-30AH (5" deep) Sealed AGM, Odyssey Battery, 12V Sealed AGM (5" deep), BMW Battery 12V Sealed AGM, K, F & R series, Shorai Lithium-Iron Battery, 18L2 - 6 Volt, XP-3 Micro-Jump Start and Personal Power Supply, Odyssey Battery, 12V Sealed AGM (PC310) for F650-G650GS, BMW Advanced Battery Charging System, 12 Volt, BMW Battery 12V Sealed for G450X, HP4 & S1000RR, Yuasa Battery for /2 Twins 1955-1969, 6 Volt, BMW Battery 12V Sealed for Early S1000RR & R1200GS Adv 08-13, Like Bob's BMW on Facebook! It seems fine but now that I know a bit more about the bike I realise I really should be going through the canbus. Forum Software Specific Help. I can either plug in an accessory, like heated clothing, or use it to, charge the battery (excuse me, maintain the battery) with my. Knowing these 2 factors allows you to narrow your search very easily. Check "Remember Me?" I don't know about that particular model of battery tender. 2. I have just (yesterday) put an Ultimate-4 on my 2015 R12R. Enjoy banner ad-free browsing with BMW R1200R Forum Plus. Be very careful when specifying a charger. 31. atv 3 BATTERYTENDER.COM 40. scooter 45. utv 47. pwc 4 BATTERYTENDER.COM The user has access to the individual cells and can add distilled water as the battery dries out. Key back on, hit the starter, and she fired right up Long story short, yes you can use a battery tender via the socket, it works just fine. BMW Motorcycle R1200RT Years Below. If the incorrect battery charger is used on a Gel Cell battery poor performance and premature failure is certain. Original and Aftermarket Battery Chargers, and Connectors for BMW Motorcycles. Hexheads. I used to leave my 2005 RT inactive for months in California, when I didn't have the time or disposition to ride it. Post by ScottC Fri Aug 30, 2019 12:25 pm. I use a Battery Tender Jr on a 2007 R1200RT and a 2021 R1250RT. For a better experience, please enable JavaScript in your browser before proceeding. I would be really leary of using a non-BMW battery charger and attempting to go through the CANBUS to charge the battery. Evotech radiator guard, Barkbuster handguards, SW Motech bash plate, Machine Art Moto X-Head covers & Mudsling, Clearwater Erica lights, ZTechnik screen, Wunderlich bar risers. I'm a Notary Public. 2011. (opens in new window), Follow Bob's BMW on Twitter! 5.0 out of 5 stars 1. I've posted on this before, but I'll say again just for fun - If different charge rates for different battery types was super critical, how come there aren't a whole bunch of different alternator/voltage regulators on the bike? Capable of charging installed batteries through the accessory socket of all BMW motorcycles, including 'CAN-Bus' models (~ 2005 and later). Though the $193 that BMW charges for a K13S bike is over 100$ more than a Yuasa AGM battery made in the states. For a better experience, please enable JavaScript in your browser before proceeding. Bob McKeeSeptember 5, 2008 in Hexheads. In general, the best way to charge ANY bike is to attach a permenant SAE connector and simply plug in the charger directly to the battery. 1,423 Battery for 2015 R1200RT The BMW battery (Exide) is very expensive and a tight fit. Post/terminal position and polarity are also considerations. The Fora platform includes forum software by XenForo. BMW R1200RT 10-13; BMW R1200RT WC 14-on; BMW . I have gone up to a month without riding my Wethead RT and said to myself "maybe I should put it on the tender". I had 2 other BMWs before my '21 bike. $14.00 BMW Battery 12V-19AH Sealed GEL (3" deep) $199.00 WestCo Battery 12V-22AH (3" deep) Sealed AGM. But I must double check. Without a battery that functions properly, your car or truck won't start and you'll be left stranded. In theory, this enhances both the discharge and recharge efficiency. Is a battery tender still necessary for the new bikes? Feb 10, 2022 I suggest you put an ammeter in the circuit and see what the drain is, chase it from there. Battery Tender. All you can get by doing it are benefits. I bought a Battery Tender Junior which I've used for 2 winters on my 06 RT. For a better experience, please enable JavaScript in your browser before proceeding. BMW Battery 12V Sealed for Early S1000RR & R1200GS Adv 08-13. So, when questions come to mind about BMW motorcycle batteries or other products in our inventory and they will free to contact us with any inquiries. Important to get a good one. No problems using a Battery Tender. What is the manurfacturer and model number? I just park the bike, plug in the charger to the socket, then charger into the wall. I think the manual says to not do this else risk damage to the electrics, and yet I see videos of people connecting leads to the battery without disconnecting the battery to isolate the electrics from the trickle charger. After replacing with new unit, hooked up as usual, but didn't ride for close to a month. Pretty much everybody uses trickle chargers on their bikes if they are not ridden often enough (weekly minimum) to keep the battery charged. Once method of delivering power to the battery is defined, one can get as picky as one chooses with the actual charger / battery match. That way, to charge the battery, you only need to remove the passenger seat and plug it in. Original and Aftermarket Battery Chargers, and Connectorsfor BMW Motorcycles. Reply Save Like 2 Riding in Nor Cal during winter is a little frequent, but not always due to heavy rains etc. ALL were on trickle charger all of the time, unless ridden. The Fora platform includes forum software by XenForo. Don't leave home without it! Forget any discussions re: gas tank removal. Just want to follow the thread and not create another one. Powered by Invision Community. In total there were 231 users :: 52 registered, 6 bots, 1 hidden and 172 guests active over the last 24 hours Registered users: 60Aviator, 7vwh, afmb, AlabamaRT3B, Baggers, BoB21, Boxflyer, burridge01, ColoradoGreek, David., DDMD, Doctor T, Ed Harley, Elkinell, EngMarc, exportman, Fourbears, Gavj, Glenn, hairynik, hammo, IvanIvanov92, jcayley, Jeff_M, jjwill, jkk58, k9doc, keith57, kickstart, Kim_Y, MarkieT, Marvin2Shoes, michaelc2710, MikeS, Motor32, Our Gee, p29857, Panman40, Peter Baker, potatan, Randyjaco, rory2112, RTs4me, Sacowan, sakm, scunny12, sgkramer, Sharkfighter, SimonD, Steve398, thwak, Tiedend Bots: AdsBot [Google], Ahrefs [Bot], Bing [Bot], Google [Bot], Majestic-12 [Bot], Semrush [Bot], Powered by phpBB Forum Software phpBB Limited. I just returned from the dealer in Sturgis after having had my 600 mi check and they were adamant about not being able to use a Battery Tender Plus to charge with unless one disconnects one of the terminals from the battery to the bike before beginning. You can too. Mar 21, 2020 The easy way to avoid CANBUS issues is to never tie into the harness for new circuits other than as a signal wire. Electrical system. Check the Battery Tender WEbsite ot make sure you charger is compatible with the newer AGM batteries. Free . In the strictest sense of the word, different battery types have slightly different ideal charging curves. M/C DISCUSSIONS. Unfortunately, batteries don't last forever and must be replaced every few years. 2012. Ive done it, mainly because I forgot to unplug the charger. I've generally had better luck with the OEM batteries. By the way it is an 05 R12RT. 2015 R1200R, in the awesome Thundergrey metallic! I don't ride every day, in fact there may be a month or two when I'm to busy with work and other stuff so I do keep mine on a tender. You can quickly filter our selection of BMW motorcycle batteries by using the left column to specify your model. Buy Bmw Advanced Battery Charging System: Battery Chargers - Amazon.com FREE DELIVERY possible on eligible purchases Skip to main content . Battery tender is the way to go. I want to be able to use a battery tender on my '08 R12RT this winter when it's going to sit for more than a few days. The moral of the story is that using a charger on a GEL Cell that is not specifically for a GELL Cell (whether BMW or not) can very well toast the battery. #2 If I use a generic battery tender not designed for the BMW canbus, will it destroy the onboard computer of the bik. A large percentage of these are sealed, pre-charged batteries ready to install and ride. Content on R1200RForum.com is generated by its users. '22 BMW R1250GSA; Triple Black; Low Suspension; Alum Panniers and VStream Tall Windscreen; 40mm risers; Aerowings & Handguard Extensions. If you are using the BMW socket Powerlet adapter that goes straight to the battery (bypasses Canbus control) then pretty much any battery tender should do. The high-quality BMW Motorrad Battery Charger Plus allows for fully automatic, microprocessor-controlled charging and care of all original BMW Motorrad batteries including BMW Motorrad lithium ion 12 V batteries with a capacity of 6 to 60 Ah. I have used Optimate with a connected battery with no issues. I have a couple BMW chargers - one for the 2007, one for the 2015 [RT's]. You can choose OEM, of course, or select options from an assortment of excellent aftermarket batteries all ready when you need them. 2006. When needed I just plug my original "Battery Tender" directly into it and it works just fine. A forum community dedicated to BMW Luxury Touring motorcycle owners and enthusiasts. YMMV, etc. No problem. At that point the charger turns off and the socket will also shut off. . $178.72 $ 178. I've mentioned before the down side is masking the impending failure of a battery by keeping the voltage up and not really knowing its capacity level. Gel Batteries are best used in VERY DEEP cycle application and may last a bit longer in hot weather applications. GEL: The gel cell is similar to the AGM style because the electrolyte is suspended, but different because technically the AGM battery is still considered to be a wet cell. Presumably with the battery remaining connected, yes? How do I know if I'm bypassing the Canbus system without simply wiring straight to the battery? Discover more about the small businesses partnering with Amazon and Amazons commitment to empowering them. Charging of the connected battery on the battery terminals. Good idea to use a fuse on any connection going direct to the battery! Most all ones these days to this but you have to check. Do you want to trust that will never happen directly under you seat or gas tank? And AGM is a gel battery with a slightly different design. 1996-2023, Amazon.com, Inc. or its affiliates, Select a location to see product availability , Battery for scooter, bike dirt, bike, ATV YTZ12S, MMG Motorcycle Battery Lithium Ion (YTZ14S-CCA 300), MMG YTZ14S Z14S Lithium Ion Sealed Factory Activated Powersports Battery 12V CCA 300 for Motorcycle BMW Honda KTM Yamaha (MMG4), Enter a new vehicle to add it to Your Garage and filter the results below, Caltric Agm Battery Compatible with BMW R1200Rt R1200 Rt 2004-2014. $167.99 plus free ground shipping anywhere in the US. Extending the battery life of them is the goal of my rotating my 2 chargers every few days between them. The first one didn't last long due to my own inexperience. When using the BMW socket on an R1200-RT to charge the battery, one must either have a charger that is Canbus friendly (such as the BMW charger) or one must rewire the BMW socket to go directly to the battery (with a fuse). What other battery (ies) can fit into that space? A forum community dedicated to BMW R1200R motorcycle owners and enthusiasts. My Account; Order List; My Wishlist; Checkout; Login; Power Sport Guarantee; Battery Shipping Policy . For us, it's not only the merchandise. BMWLT.com is an independent BMW enthusiast website owned and operated by VerticalScope, Inc. Battery Tender assures the highest quality, fast-charging convenience and performance. Welcome Guest! It does seem that everyone doesn't know that the lifespan of a motorcycle battery can be significantly increased simply through basic care and maintenance! Another option than the BMW one is an Optimate. 2013. I have two of these chargers and they stay on the bike's while in the garage. But I now recall the 2008 RT is Canbus. This is also a sealed battery. Shouldnt be a problem as the charger will see 14 v charging at the battery and stop charging. I've farkled this thing to buggery! Jan 29, 2022 Nonsense. The CANBUS system disables the aux socket after about 5 minutes. 2010. 2015+ R1200/1250R LC Technical & Performance. I bought the factory one and after a month gave it back to my dealer for a battery tender in exchange. Hated the factory one with its process of making it work. BMW "Battery Tender" SAE Adapter Plug. BMW Motorcycles Protective Wear & Rain Gear, BMW Motorcycles Shirts, T-Shirts & Sweatshirts, BMW Motorcycles Suits, Jackets, & Pants (Textile & Leather), Battery Tender Connector with BMW Motorcycles Plug, BMW Motorcycles CAN-BUS Battery Charger Plus, OptiMate 4 CAN-BUS Motorcycle Battery Charger with BMW Plug, Shorai Charge and Store Motorcycle Battery Management System, Antigravity Micro-Start XP-1 Motorcycle Jump Starter / Battery, OptiMate Lithium (LiFe) Motorcycle Battery Charger with BMW Plug. Or one could do as I did and add a BMW (or Powerlet) socket on, the right side of the tail piece (providing the spot is vacant) and wire it directly to the battery (fused, of course). Have you ever seen a Lithium battery fire? Let all the air out of both tires, then use the cyclePump to re-inflate the tires. Dec 16, 2021 Is a battery tender still necessary for the new bikes? This being said, I R&R the battery w/ a new one every 3y tops, regardless of its state of health, because it plays such a critical role, and is essentially chump change when spread over 3y, and in the context of all costs of operation. I want to be able to use a battery tender on my '08 R12RT this winter when it's going to sit for more than a few days. Oh Oh! Dealer pricing and volume discounts available ODYSSEY Powersport Battery Model ODS-AGM16L (PC680) (internal threaded brass terminals, M6 SS bolts, and L bracket adapter) The Fora platform includes forum software by XenForo. Search; Battery Tender. It's nice to know that even the best batteries and battery accessories are really not that expensive, and at Bob's . I just find going through the socket convenient for me. "On a cycle the frame is gone. Actually, the AGM batteries are a variant of Sealed VRLA batteries. New Yuasa Maintenance Free Motorcycle Battery - Fits: 2005-2013 BMW R1200RT. This topic is now archived and is closed to further replies. 99. At Bob's, we offer a motorcycle battery to fit every BMW model. More often than not, what someone thinks to be a Gel Cell is really a sealed, maintenance free, GRT, probably AGM style battery. Powered by Invision Community. The recharge voltages on this type of cell are lower than the other styles of lead acid battery. I suspect it would, if the charger went to zero volts/amps. Whether or not a bike needs a battery tender attached is entirely related to the battery technology, and as far as I know, all AGM batteries will deteriorate if not regularly, and properly charged. Instant decision & no effect to your credit. I can see why there are so many frustrated riders out there. Jeff Dean Tucson, Arizona, and Madison, Wisconsin Co-founder, 1972, of BMW MOA -- http://bmwdean.com/r1200rtw.htm . (obviously, ride more often is one solution, 2021 Alpine White R1250RT, 2007 Biarritz Blue R1200RT. Dont ride off with it connected though, unless you have a really long cord ! I know you can't use the old non-gel Bat Tender through the power socket, but can you hook it directly to the battery? FWIW, when the bike is not being used (Summer is the off season in Las Vegas) I give it an overnight trickle charge every few weeks. Very popular uses are engine start and limited starting/deep cycle applications. Hi I did a search for which type of battery . FREE delivery May 25 - 30 . Went out to ride the RT one day after letting it sit and found the battery was too low to turn it over. $169.99 $ 169. RESPECT MY AUTHORITY! All my plugs are now fused and hard wired to batt so I can use my batt tender,,My Gerbing would not stay on with the can bus sys,. Will any battery tender with a powerlet adapter work when plugged into the factory accessory plug, or is there something "magical" about the BMW one that makes it the only viable. if you wish to stay logged in. 2 Next bargood Posts:2 Joined:Sat Jun 20, 2020 3:30 am Trickle charging Postby bargood Sun Jun 21, 2020 6:09 am I just purchased a 2013 R1200RT. No, unfortunately. No problems here. Keep your bike running smoothly with the best BMW R1200RT 1200CC Motorcycle Battery at Batteries Plus Bulbs. Nonsense. (See Figures 39, 40 and 41). When you purchase through links on our site, we may earn an affiliate commission, which supports our community. I suspect any battery charger that is compatible with the battery type will be fine. Have read posts regarding CANBUS might decide not to recognize, no matter how you hook up through socket (turn ignition on, plug into socket, than connect to electrical source, than turn off ignition). Always thought if the warning red light flashing on handle bar, than the battery was charging. I purchased the BMW charger and a battery tender a year after getting the bike. Sounds like your dealer is full of BS. Skip to content. 2018 R1200RS Founding member of the Banned from the OCI Club. P.S. Keep tuned it to a slow start event combined with old age. Can I just plug it into the AUX socket? I've been using a c-tek connected direct to the battery via pigtail, mainly because I am pig-headed and resented coughing up for an optimate. . I also replaced the AGM batteries about every 3 years. I've posted on this before, but I'll say again just for fun - If different charge rates for different battery types was super critical, how come there aren't a whole bunch of different alternator/voltage regulators on the bike? By The think I wasn't sure of though, are you leaving the battery hooked to the bike when you use that connection to charge it? Come join the discussion about parts, troubleshooting, maintenance, performance, reviews, modifications, classifieds, and more! But, at 1 amp, it would take a very long time to cook the battery Good to know. Went to start, and barely turned over. Congratulations ! It's beemer not bimmer (the car). Current rides: 2013 R1200RT 90th - 111k miles & 2007 R1200S. You're completely in contact with it all. The proper lights light up on the optimate. check out the. The comments about AGMs "not staying charged long" run counter to everything I know about AGMs from the solar/rv world, where they are preferred (when budget allows) over flooded lead acid batteries because of their low self-discharge rate, like ~3% a month vs ~10% a month, and their depth of discharge. Fiberglass mat cushions. Our friendly, knowledgeable staff is always ready to help. Content on BMWLT.com is generated by its users. I remove the key so I can't start it while connected. Pulled the wiper blade and easy peazy lemon squeezy swapped the BMW 570CC battery with a 610CC. Will any battery tender with a powerlet adapter work when plugged into the factory accessory plug, or is there something "magical" about the BMW one that makes it the only viable solution? . R1200RForum.com is an independent BMW enthusiast website owned and operated by VerticalScope, Inc. The BMW battery charger will plug right in and doesn't need the adaptor - just check it periodically as mine has now started to overheat and apparently isn't charging the bike after a software reflash! $98.95 Add to Cart Tweet The Optimate 4 Dual Program is the highest technology motorcycle battery charger on the market, and the best charger for any CAN-bus machine! I do this with my 2102 G 650 GS. Just as important as the batteries, we also carry the battery chargers, maintenance tools, and accessories you need to keep your battery in top condition. How about some suggestions of turning the ACC on first then plug the charger then stitching the bike ACC off. Re-wired the factory power accessory outlet directly from battery. Get PRE-APPROVED for the bike of your dreams! Battery Tender on Canbus '06 R1200RT I have a 06 R1200 RT with the CANBUS. Typical absorption voltage range 14.4 to 15.0 volts, typical float voltage range 13.2 to 13.8 volts. If you do go directly to the battery, do you have to unhook the battery from the bike? INTROs -- New Member Introductions & Photos, 2015+ R1200/1250R LC Accessories & Appearance. Note: Remove battery from CAN-Bus bikes before charging. If you don't maintain your battery properly, it . BMWLT.com is not in any way affiliated with Bayerische Motoren Werks AG, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Anyway the topic is a good one to deal with before you actually need the device utility. I think the preferred term these days is "battery tender". The battery is charged by an alternator. They say this will start the charge. Thanks all, I already have the optimate 4 and plugged it in and seems to be all OK. While I haven't tried the CyclePump unit, my Airman Sparrow will inflate a tire from the BMW socket without breaking a sweat. I wonder though, what would happen with the battery tender type charger that shuts off (or at least greatly reduces voltage) when it cycles. If you hook it directly to the battery, do you have to unhook the battery from the bike? Last edited by bmwdean; 05-09-2019 at 04:24 PM . 2007. Note also that the manual cautions against charging the battery without disconnecting it. Eliminate both worries by using the Powerlet adapter I linked to in my post above. Fires up every time, and I have had no problems so far. Your plan of getting a fresh battery every three years is very reasonable in my opinion. Content on BMWLT.com is generated by its users. I use the same connector as for my heated clothing, that way one cable serves dual purpose. Can you use the Battery Tender + for gel batteries, model # 021-0156, through the power socket, or do you have to hook it directly to the battery? Well, not so sure. Both need to go direct to the battery. J judgedelta Registered I wouldn't be concerned, joe. 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