Replacement Battery Twins



Earn up to 89 NewBonneville Bucks.

Sealed AGM replacement battery for the Triumph Bonneville, Thruxton, Scrambler, America and Speedmaster.
If you want THE best – Look no further

(Why you should upgrade/replace your YUASA battery)

What is an AGM battery?
AGM is an abbreviation for absorbed glass mat. In this design, the acid is completely absorbed into glass mat separators which are sandwiched between the lead plates. It’s a totally sealed and maintenance free design. There are no discharge tubes or fillers caps, which eliminates the need to maintain water levels and offers no concern about acid leaks on valuable parts and accessories.

Why is an AGM battery better than a conventional motorcycle battery?
AGM batteries offer the following advantages over conventional batteries:
– Sealed maintenance free design means you never have to worry about checking water levels.
– AGM technology will not leak or corrode on paint and chrome.
– They have less internal resistance which offers more CCA amperage than wet batteries.
– By nature AGM batteries are more heat and vibration resistant than conventional batteries, both which contribute to the large majority of failures in motorcycle applications.
– Slower self discharge rate (longer shelf life) means battery can sit for extended periods of time without constant monitoring. A wet battery discharges 15% a month, where our AGM batteries discharge only 2-3% a month.

Should longer service life be expected from an AGM battery?
– The main reason wet batteries fail is due to the fact that water levels are not properly monitored coupled with the fact that they are not very vibration resistant. AGM batteries do not have to be constantly maintained and are much more resistant to both heat and vibration, which is why they offer longer service life.

Do I need to charge my battery when I get it?

12V12B measures 6″ X 3-7/16″ X 5-1/8″
12V12B-4 measures 6″ X 2-3/4″ X 5-1/8″

Additional information

Weight N/A
Cross Reference

Upgrades Yuasa YTX12-BS, Upgrades Yuasa YT12B-BS (SLIM)