BMW R1150R, RS, RT (2001-'06) Motorcycle Batteries

Why the Right Battery Matters for Your BMW 1150

The R1150R, R1150RS, and R1150RT all share the same battery group, but that does not mean every battery on the market will fit or perform the way your bike needs. These bikes rely on a compact 12V AGM battery to run fuel injection, ABS, and onboard electronics, so a battery that is even slightly underpowered can leave you with hard starts or a bike that will not fire up at all after sitting.

Are you tired of a battery that dies over the winter or after a few weeks parked in the garage? AGM batteries like these are sealed and spill-proof, which makes them a good match for a bike that may not get ridden every day. We carry a range of options for the R1150R, RS, and RT platform, including:

• Standard sealed lead acid and AGM batteries built to OEM specs
• Higher-output AGM batteries such as the Odyssey PC680 and Motobatt MB51814 for stronger cold cranking amps
• A lightweight EarthX lithium battery for riders who want to shed a few pounds off the front end

How to Choose a Replacement Battery for Your BMW 1150

Not every rider needs the same thing from a battery, so here is how the main types stack up:

• Sealed Lead Acid (SLA): The most budget-friendly choice and a solid pick if you ride often and keep the battery charged.
• AGM: The OEM-style option for these bikes. AGM batteries handle vibration well and rarely leak, making them a dependable daily-rider choice.
• Performance AGM (Odyssey, Motobatt): Built for higher cranking power and longer service life, ideal if you tour, ride in cold weather, or run extra electronics.
• Lithium (EarthX): The lightest option by far, with fast recharge times and a long lifespan, though it comes at a higher price point.

If you are unsure which battery best fits your riding habits, our team is happy to help. You can reach us through our contact page, and any battery you order is covered by our 60-day return policy if it is not the right fit.

Frequently Asked Questions

What size battery does my BMW R1150R, RS, or RT take?

A: These models use a 12V AGM battery roughly 7.1" long, 3" wide, and 6.6" tall, with capacity ranging from about 18 to 22 Ah depending on the battery. Always check the dimensions listed on each product page against your old battery before ordering.

Will the same battery fit all three models: R, RS, and RT?

A: Yes. The R1150R, R1150RS, and R1150RT from this generation share the same battery tray and terminal layout, so any battery listed on this page will fit all three models.

Do I need to remove the fuel tank to replace the battery?

A: No, on most R1150 models the battery can be accessed by removing the seat and side panel without pulling the fuel tank. Refer to your owner's manual for the exact steps for your model year.

What's the difference between the AGM and lithium options?

A: AGM batteries are the closest match to your original BMW battery and are a reliable, lower-cost choice. Lithium batteries like the EarthX weigh significantly less and recharge faster, but cost more upfront.

How do I keep my battery from dying when I'm not riding?

A: Connect a battery tender or maintenance charger whenever the bike is parked for more than a couple of weeks. This is especially important for AGM batteries in cold weather or winter storage, since a full discharge can shorten their lifespan.