Triumph Bonneville T100, SE, FI Battery
The Triumph Bonneville T100, SE, FI (865cc) takes a YTX12-BS battery, about 180 CCA and 10 Ah. It is a sealed agm (maintenance-free), and a lithium drop-in fits the same case.
Key takeaways
- Battery: YTX12-BS.
- Sealed AGM (maintenance-free), around 180 CCA, 10 Ah.
- Lithium drop-in fits the same YTX12-BS case - lighter, longer-lived, needs a lithium charger.
- Covers 2005-2013 (battery changed across years - see table).
- Chemistry (OEM)
- Sealed AGM (maintenance-free)
- Cold cranking amps (CCA)
- 180
- Capacity
- 10 Ah
- Engine
- 865cc
- Fits model years
- 2011-2013
The -BS suffix means it ships dry with an acid pack you add once - after that it is a sealed, maintenance-free AGM battery.
The Triumph Bonneville T100, SE, FI uses a YTX12-BS - sealed agm (maintenance-free). Around 180 CCA of cold-start current. Meeting or beating the OEM rating is fine; going under it can cause hard starts in the cold. About 10 Ah of capacity - the reserve that runs lights and electronics with the engine off.
AGM is the safe like-for-like: cheapest, tolerant of standard chargers and trickle tenders, and heavier. Lithium (LiFePO4) drop-ins in the same case size cut weight by roughly 60-70%, hold voltage better, and self-discharge far slower - but they cost more and need a lithium-aware charger, not an old lead-acid trickle charger.
Buy the battery for your Triumph Bonneville T100, SE, FI
AGM is the safe like-for-like: cheapest, tolerant of standard chargers and trickle tenders, and heavier. Lithium (LiFePO4) drop-ins in the same case size cut weight by roughly 60-70%, hold voltage better, and self-discharge far slower - but they cost more and need a lithium-aware charger, not an old lead-acid trickle charger.
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Triumph Bonneville T100, SE, FI battery by year
Installing it
Disconnect the negative (-) terminal first and reconnect it last. Powersports batteries are small and light, so this is usually a 10-15 minute job with a couple of hand tools.
Frequently asked
What battery does a Triumph Bonneville T100, SE, FI take?
The Triumph Bonneville T100, SE, FI takes a YTX12-BS battery, a sealed agm (maintenance-free) rated around 180 CCA and 10 Ah.
Is the YTX12-BS an AGM or lithium battery?
Sealed AGM (maintenance-free). The -BS suffix means it ships dry with an acid pack you add once - after that it is a sealed, maintenance-free AGM battery. You can also fit a LiFePO4 lithium drop-in in the same YTX12-BS case size for less weight and longer life - just use a lithium-aware charger.
How many cold cranking amps (CCA) does it need?
Around 180 CCA of cold-start current. Meeting or beating the OEM rating is fine; going under it can cause hard starts in the cold.
Can I put a lithium battery in a Triumph Bonneville T100, SE, FI?
Yes. Lithium (LiFePO4) drop-ins are made in the same YTX12-BS case size, so they fit the tray and terminals. They weigh far less and last longer, but need a lithium-compatible charger rather than an old lead-acid trickle charger.
How do I change the battery on a Triumph Bonneville T100, SE, FI?
Disconnect the negative (-) terminal first and reconnect it last. Powersports batteries are small and light, so this is usually a 10-15 minute job with a couple of hand tools.
Other motorcycles that take a YTX12-BS
See every model that uses a YTX12-BS battery →More parts for your Triumph Bonneville T100, SE, FI
We cover the other consumables for your machine too - the exact fit, cited, in one place.