As WP says, depends on the Lipo. If it can handle 5C charge (C meaning the number with you multiply the amount of mAh to calculate the maximum safe charge current) you would be able to charge a 4000 mAh lipo with 4000 x 5 = 20000 mA so 20A. If it can handle only 2C, the maximum safe charge is only 8A, etc.
If you want a more direct answer, you have to post a picture of your lipos.
Meanwhile, get to know more a bout lipos, as treating them safely is the key yo prevent one day your car, or even your home catching fire. Lipos are to be treated with respect: