FST Platform/12V Battery

Gen3 models like the SR/F include a 12V backup battery with Lithium Iron Phosphate (LiFeO₄) chemistry.

Behavior

There is a small heater for this battery which engages when the bike is stored at below freezing temperatures and is keyed on.

The battery is charged via the 12V bus supplied by the DC-DC 12V Converter while keyed on.

Reportedly, while keyed off, the DC-DC 12V Converter is engaged periodically to maintain the battery charge.

• This makes working on the bike require extra lockout steps for safety. Reportedly, the externally accessible B+ and B- fuses are recommended to be removed.

Location

Under the rider's seat section.