You may end up using camcorder or cell phone batteries. These are removable batteries in a hard case. They tend have protection cells inside the case. This battery for example, is an old project battery from before you could buy lipoly batteries easily.This guide was first published on Jul 29, 2012. It was last updated on Sep 21, 2018. This page (Cell Phone & Camcorder Batteries) was last updated on May 04, 2015.