Free Economy ShippingProduct Specifications for Marathon AGM 51913 Battery - 12V BMW Motorcycle Battery Replacement
| BM Part #: | AGM-51913 |
|---|---|
| Battery Polarity: |
|
| Voltage: | 12 Volt |
| Cold Cranking Amps: | 220 CCA |
| Capacity: | 22 Ah |
| Type: | AGM |
| Length: | 7.1" |
| Width: | 2.9" |
| Height: | 6.5" |
| Shipping Weight: | 12.00Lbs |
| Warranty: | 1 Year Pro-rated |
- AGM Technology: Built with absorbed glass mat (AGM) construction, this battery is completely sealed and never needs water. It resists vibration, handles tough riding conditions, and installs without mess.
- OEM-Size Fitment: Replaces the original 51913 battery size used in many BMW motorcycles. Common in models like the R1200RT, K1200LT, K1300GT, R1100, and more.
- Strong Performance: Rated at 220 cold cranking amps (CCA), this battery delivers reliable starts even in cooler temperatures.
- Ready to Install: Ships fully charged – just drop it in and ride. No acid filling or prep required.
- Great Value: Priced for budget-conscious riders without compromising on quality. Includes a 1-year pro-rated warranty.
- Direct AGM replacement for the Yuasa 51913.
- Fits popular BMW models: R1200RT, K1200LT, K1300GT & more
- Note: Product will ship with the adapters uninstalled for safety during shipping.
Product Description
51913 AGM Motorcycle Battery Replacement for BMW – Sealed, Maintenance-Free
Looking for a reliable replacement for your BMW motorcycle battery? The Marathon AGM-51913 is a sealed, maintenance-free battery designed to deliver dependable starting power and long-lasting performance. This 12V battery is an affordable, high-value equivalent to the Yuasa 51913 battery, but without the Yuasa branding or price tag.
Recommended Charger:
We recommend pairing this battery with our ENC2A 2A Smart Charger. This charger helps maintain your battery for maximum lifespan and performance – perfect for winter storage or infrequent riding.
Ride Confidently with a Trusted Battery
Whether you’re riding cross-country or commuting locally, the Marathon AGM-51913 is a dependable choice trusted by DIY riders and shops alike.
Frequently Asked Questions
How long will the Marathon 51913 AGM battery last?
A: A well-maintained AGM motorcycle battery typically lasts around three to five years, although its actual service life depends on riding frequency, storage conditions, climate, and the motorcycle’s charging system. Keeping the battery fully charged during storage and avoiding repeated deep discharges can help extend its lifespan.
How should I store this battery in the off-season?
A: Fully charge the battery before storing the motorcycle and connect it to an AGM-compatible maintainer if possible. Store the battery in a cool, dry location away from excessive heat. If you remove it from the motorcycle, keep it off damp surfaces and periodically check that it remains charged.
Is the 51913 AGM battery the same size as the original Yuasa 51913?
A: This battery is designed as a direct replacement for the Yuasa 51913 battery. Before ordering, it is still a good idea to compare the dimensions, terminal placement, and polarity with your existing battery, particularly if the motorcycle has been modified or previously fitted with a different battery.
Can accessories on my motorcycle drain this battery?
A: Heated grips, auxiliary lighting, GPS units, phone chargers, and other accessories add to the motorcycle’s electrical demand. They may drain the battery when used while the engine is off or if the charging system cannot keep up at low speeds. Always switch accessories off before parking and consider a maintainer if the motorcycle is ridden infrequently.
How can I confirm the Marathon 51913 AGM battery will fit my BMW motorcycle?
A: Check the year, make, and model against the application information provided on the page. It is also a good idea to compare the battery’s dimensions, terminal location, and polarity with the battery currently installed.
Cross Reference & Compatibility
This battery can be used in these models:
| Make | Engine | Model | Year(s) | Yuasa Battery Model |
|---|---|---|---|---|
| BMW | 1100cc | K1100LT/RS | 1990 - 1995 | 51913 |
| BMW | 1200cc | K1200LT, GT | 2005 - 2009 | 51913 |
| BMW | 1200cc | K1200LT, GT, RS, S | 1999 - 2005 | 51913 |
| BMW | 1200cc | K1200RS | 1997 - 2005 | 51913 |
| BMW | 1300cc | K1300GT | 2009 - 2011 | 51913 |
| BMW | 1600cc | K1600GT, GTL | 2011 - 2017 | 51913 |
| BMW | 750cc | K75 | 1993 - 1995 | 51913 |
| BMW | 750cc | K75RT | 1992 - 1996 | 51913 |
| BMW | 1100cc | R1100GS | 1994 - 2000 | 51913 |
| BMW | 1100cc | R1100R | 1994 - 2000 | 51913 |
| BMW | 1100cc | R1100RS, RT | 1993 - 2000 | 51913 |
| BMW | 1100cc | R1100S, ABS | 1998 - 2005 | 51913 |
| BMW | 1150cc | R1150GS, R | 2000 - 2005 | 51913 |
| BMW | 1150cc | R1150R, RS, RT | 2001 - 2006 | 51913 |
| BMW | 1200cc | R1200C | 1998 - 2005 | 51913 |
| BMW | 1200cc | R1200RT | 2005 - 2013 | 51913 |
| BMW | 850cc | R850R | 1995 - 1997 | 51913 |
Customer Reviews
Battery Mart deliver the replacement promptly, The battery works great, its as advertised and a good value. The install was a little tough with my bike with the side mount terminals which is the reason for 4 instead of 5.
Works great!!
It fit,and it started the motorcycle.
Just purchased a couple of these batteries for older RT1150s that had the same battery. The old ones lasted around 5 years
I've ordered a few batteries from you guys over the years. you usually have what I want at a good price. Thanks so much!
BMW K1200LT battery
I recently purchased a “maintenance free” battery from Battery Mart for my 1997 BMW R 1100 RT. Despite living in Texas I had the battery shipped to Michigan in which I was enroute to. The battery arrived within 3 days, the day upon my arrival. I installed the battery that day and have been using the bike daily for the last two weeks. Very satisfied with price, delivery and performance.
