Yeah I don't want to mess with lithium batteries due to my children using the blasters. I will maybe mess around with adding aa (cell) rechargeable NIMH batteries if 4 is not enough. I was just curious because I see some NiMH say sub c so that just means more available current due to the larger cells. I know Lipos use the c rating which is nice but NiMH don't use any rating like that that I have seen.
And yes all of my blasters are stock motors, stocks switches, not wanting to burn too much up. I just removed some of the resistance by using larger wire, removing some safeties, and removing as many circuit boards as possible and more direct wire the blasters. And I did notice some slight improvements in the blasters.
Thanks for the help, I will maybe just do something similar and make a RC style pack just using my rechargeable AA batteries. I am running energizer ones that are rated at I think 2100mAH and have high reviews and they seem to be pretty decent.