What can I tell you about the Battery Tender that hasn't been said by every major publication? It's simply the best maintenance charger money can buy. Just plug it into your bike, and your battery is well taken care of - for a week, or for several months. Motorcycle Consumer News performed an exhaustive comparisons of all the top chargers on the market, and Battery Tender won hands down. The Battery Tender family of chargers is fully automatic - they will completely charge a battery, then automatically switch to a float/maintenance mode to maintain the life and health of the battery for as long as necessary. Battery Tenders are protected from short circuits and reversed polarity, so you can use them with confidence. We carry the Battery Tender Plus, which includes temperature compensation to ensure optiumum charge voltage regardless of the ambient temperature. This is the one to use for winter storage of your bike. For lighter-duty use (for example, those lucky among you who have so many bikes that some don't get ridden very often), the Battery Tender Junior works great for 1/2 the cost. The International version has all the features of the Plus, and it will work on any household current in the world. Finally, if you need to protect a full stable of bikes, the 4-bank Battery Tender is basically four complete International Battery Tenders in a single housing! For BMW use, be sure to get the PowerLet Battery Tender Adapter, which allows you to plug the Tender directly into the BMW accessory socket.

Battery Tender Plus is the award-winning top of the line 1.25A maintenance charger for any 12-volt vehicle. 4-Step charging (Initialization, Bulk Charge, Absorption Mode, Float/Maintenance). Automatic temperature compensation; spark-proof; short-circuit & reverse polarity protected. Just plug it into the bike, and forget it! 10-year warranty.   Choose Version: Select the version that you need: BT-021-0128: Standard charger for wet cell or AGM batteries - $59.95 BT-021-0156: True Gel charger for BMW Gell batteries - $59.95 Add PL-PAC-008-6 - PowerLet adapter to plug directly into BMW accessory sockets ($13.95) $59.95  Qty: Battery Tender Junior - This 0.75A "Little Brother" of the Battery Tender Plus is a mighty performer in a small package. Its 3-step charging (Initialization, Bulk Charge, Float/Maintenance) is great for keeping your battery in tip-top shape over extended down-time. Spark proof, short-circuit and reverse polarity protected, fully automatic switching from charge mode to float mode. 5-year warranty.   $29.95  Qty: # BT-021-0123 Waterproof Battery Tender - The Waterproof 800ma International Battery Tender provides the same features as the Battery Tender Junior, but it's totally encapsulated so that it can operate even while submersed! Perfect for jet-skis, bikes, or ATVs that are stored outdoors. Works anywhere in the world with 100v to 240v input compatibility.   $49.95  Qty: # BT-022-0150DLWH Battery Tender International - The same great features as the Battery Tender Plus, with the added benefit of automatic adaptation to household current of 100 to 240 volts - Plug it in anywhere in the world, and it will work fine! Includes zipper storage pouch.   $69.95  Qty: # BT-022-0139DLWH Battery Tender 4-Bank Charging Station. If you have multiple bikes, this is a "Must Have" accessory. Four independent Battery Tender 4-step chargers built into a single housing. Extension cables available below.   $249.95  Qty: # BT-022-0148 PowerLet power socket adapter for 2-pin SAE plug devices. 6" cord. Perfect for Battery Tender and many heated clothing products.   $13.95  Qty: # PL-PAC-008-6 Battery Tender hard-wire cords for multiple bikes (with black plug - not compatible with older white-plug Battery Tenders)   $5.95  Qty: # BT-081-006-96 Battery Tender 25' Snap Cord Extension - Great for use with 4-bank charging station   $14.95  Qty: # BT-081-0148-25 Battery Tender storage pouch, fits either Plus or Junior along with cords and adapters.   $4.95  Qty: # BT-500-0017X Battery Tender alligator clip cable (replacement for cable included with Battery Tenders)   $6.95  Qty: # BT-081-0069-4