SkyRC e3 Duo AC Balance ChargerPlease read manual carefully to prevent accidents! Do NOT charge more than two batteries at once, and do NOT use both ports on a single side at once. The next evolution of SkyRC's successful line of professional and economic chargers is here with the e3 Duo dual 2. 2A balance charger. e3 Duo comes ready to charge 2 3cells LiPo, LiFe and LiHV batteries in balance mode in separate channels at 20W each, and the max charge current can reach up to 2. 2A.