The e-Survey receivers come with either hot-swappable batteries or with internal battery packs. With the hot swappable battery configuration, each will last approximately six hours of. Depending on the receiver and the application, the internal batteries will last 10-12 hours. This battery life can be extended using e-Survey’s external power kit, which provides 16 hours of base operation; so, the e-Survey RTK GPS battery can last between 6 and 16 hours.