EV-Peak e4 (4Amps, 50Watts) 2S, 3S, 4S (7.4V, 11.1V, 14.8V) AC Lipo Balancing Battery Charger w/ WARRANTY SAFETY: The charger features LiPo Cell Balancing. So each cell will be charged to the proper voltage level independently. This removes the chance of overcharging a cell, potentially resulting in a fire. CONVENIENCE: The charger is quite compact. And it plugs directly into a wall outlet. It can be used with outlets around the world since it can handle 100V-240V with its auto-switching power supply. It features 4 easy to understand LED lights that indicate to the user how full the battery is. 1 LED indicates 25%. 2 LED lights indicates 50%. 3 LED lights indicates 75%. And 4 LED lights, of course, indicates a full charge. Simply plug a battery in and the charger will recognize it and begin to charge it. RELIABILITY: The e4's goal is to provide reliability. EV-Peak uses the best components on the market so that the charger will work and work well for the customer. This unit uses a fan, due to its high power to keep the internal components running calm and cool. WARRANTY: EV-Peak offers a great 1 Year warranty on their chargers. This warranty covers manufacturers defects. This warranty does not cover end-user misuse or abuse. In the event of a repair/replacement the customer is responsible for shipping the unit to us in NY, while we will cover the cost of shipping the unit back to the customer.