Used a 9.9 LiFE in my AK build. Perfect middleground to an 11.1 Lipo and a 7.2 lipo. It won't fry your gun and has the performance,more or less,of an 11.1 Great ROF and Trigger response.
YES! My peq box with a green laser built in arrived Monday, went down to my local airsoft store and the only lipo that fit in it that wasn't a 7v was the 9.9, I was just wary whether it would destroy my scars internals, might have to buy one then!