Top Force Evo Battery fitting? in Vintage Tamiya Discussion Posted November 3, 2014 I struggled finding a lipo to fit my top force and then stumbled upon a core rc.com stick pack lipo 7.4v. Works a treat and fits like a glove in the standard battery holders, so no need to mess around with the dremel! It powers my castle creations 5700kv brushless a treat, and she flys. Oh, and I'm with you, these things are made for driving. Sounds good. I have some Vapextech rounded nimh shaped LiPo's but the connection on the end of the battery sticks out a mile and I just couldn't make them fit either.