Tested with my Lipo 2S 5000mAh, it works well, ok balancing (4.2 V per cell). No error message. Instructions in English but you can find French translations on the Net. Attention, the cable of power supply 220 is not in the French format. For my part I took an old power supply on a laptop PC. I had to make me two charge leads suited my batteries (HXT 4mm and Traxxas) but when you do modeling, one always has connectors Solder ;-) So good product. Comes in 9 days.