Yeah, that PC PS would be ok. You'd be able to pull about 160watts of charging power from the charger using a 200watt supply.


A 50watt charger will limit charging current to stay under its power limit, so for a 4S, the charge rate would be 50watts/16.8v = ~3amps. The rate will start higher when the lipo voltage is lower and then fall as the lipo voltage comes up. Hard to tell how much time, but since its charging at ~60% of a 1C rate, estimate would be 1hr 40min. May be less, may be more depending on how discharged it is.