TecMate Optimate Lithium 4s 6A Battery Charger The TecMate OptiMate Lithium 4s 6A Battery Charger is a comprehensive solution for 12.8V/13.2V lithium (Lfp) battery care. It combines the functions of saving, charging, testing and maintaining into a single, fully automatic device. Designed to keep lithium batteries in optimal condition, it stands as an indispensable tool for prolonging battery life and performance. Features: Fully Automatic 12.8V/13.2V lithium (Lfp) battery saving, charger, tester and maintainer Delivers up to 6A charge current, Ampmatic technology lowers charge rate for smaller lithium batteries Multi-step program saves battery from 0.5V, then charges and balances cells within the battery quickly and efficiently Push button reset for Battery Management System (Bms) on smart lithium batteries Includes Tune stable power supply mode for troubleshooting with engine off Can be used indoor / outdoor lowest temperature -40F / -40C Safety features include no risk of overcharging, sparks suppressed, safe for long-term battery maintenance and automatic shut-down if short-circuited or battery disconnected Global input (100-240V 50-60Hz), high efficiency (Cec listed)