You let it charge thru the constant current stage (CC). Lipo charge protocol switches to constant voltage (CV) when the cells reach max voltage. You watch next time and you'll see the current decrease at constant voltage as the lipo finishes topping off. Current will get very close to or down to zero and if the balancer is satisfied with balance between cells, charger will signal charge complete and terminate. Try it next time.

Freaks nearly everybody out the 1st time if you don't know whats going on. Chargers that have a "fast" lipo charge setting - they just stop after the CC stage to save time. The CV stage takes the longest and puts in the smallest part of the lipo's capacity.