No mention if its a balance charge or not!
What is the Charge C-rate of them LiPo's - If they are Hobby King then you need not trust the whole value. When I looked last night at LiPo's I did not see any 12S, so are you using two 6S in series, say 5Ah per series string then two strings in parallel to get 10Ah.
A random HK lipo I found states 5C, zippy 25C dis 5ah 5C charge
If its just an evening multi-hour charge thats fine to go with 10A for 10Ah.
But if you are guerilla charging, I say 15-20A for 10Ah, that is 2C charge rate for HK rated 5C which you take with a grain of salt, not sure what the rule of thumb is, say slice of 1/3 of what they state.