I have this charger and love it. With that battery a 5c charge rate is over 25 amps, pretty much overkill. Make sure it's set on lipo mode first. This charger will only put out 10 amps which for your battery is less than 2c charge rate. I haven't been able to get it to put out 10amps running on ac current, when I had it pegged to 10 amps I would get an error message and it would shut down. I just dropped the charge rate to 7.5 amps and it works just fine w no problems. I have been thinking about picking up a dc power supply to run 10 amps but I am satisfied with how it runs. Now if you decide to start charging 4s packs, that's a different story. On ac power you can only charge at 3.7amps due to the wattage required to charge the battery. You would need the dc power supply for that.