Professional OptiMate battery charger for 12.8V and 16V Lithium batteries. (Plug type is USA 120V.) The Optimate TM-271 is perfect for high performance 12.8V (4s) and 16V (5s) LiFePO4 / LFP batteries that demand fully automatic, fast and accurate temperature controlled charging. Perfect for 12.8V / 16V LiFePO4 / LFP batteries sized from 2.5 to 200 Ah. Features a Power-Saving stand-by mode and Full electronic protection against errors. 3-year limited warranty.