Use this Light & Motion Li-ion Bike Light Battery to replace your Seca 400 or Stella 200L Bike Light’s rechargeable battery when it croaks. This 11.1-volt, 3-cell battery is lighter weight than equivalent NiMH batteries, which means a lighter-weight light. Expect about 500 charge cycles from each Li-ion battery, and use Light & Motion’s Smart Charger to re-juice. You can also return your dead bike light battery to Light & Motion for recycling.