Triton TC36LS 3.6 Volt Lithium Ion Screwdriver Lithium ion battery technology. Retains its charge, even after extended periods of non-use. 3.6v high performance, light-weight rechargeable battery. Battery charged LED indicates charging cycle. Quick-action direction switch for forward and reverse applications. Direct plug-in charger provides quick and simple re-charge function. Convenient carry case provides safe storage and easy accessibility.