Originally Posted by Ediaz

Hello guys,

I have an ICE charger and a 17amp power supply, does it take 2 hours for a 4000 pack to charge @ 4 amps?

Also the charger starts at 4 amps then it starts going down as the pack charges like one amp- every hour, when the battery is almost done it is charging at .18 amps. Is this the way it is?

I was thinking my power supply was bad , got a new one still same. Maybe charger is bad?

thank you for looking

Originally Posted by AreCee

Have you even read the instructions?

A 1C charge is where the charging amperage matches that of the battery. ie, a 4000mah battery = 4 amps therefore theoretically it should take one hour to charge. However the charger is programed to start reducing the current once the battery voltage reaches 4.2v/cell. That is typical of a constant current constant voltage charger.

Usually once the 4.2 volt threshold is detected the battery is 90% charged. The last 10% could take as long as the first as the charger balances each cell if you are balance charging.

Now add to that the fact that you will not be discharging a lipo below 3.0 volts/cell means that the battery has charge left in it so in your example it could hace 1 to 1.5 amps left so you are only putting in less than the total capacity of the pack.

See how easy that is and it;s all in the manual too for your future reference.