As i said i have run one pump from my van battery for over a year and no problems. But now i have two pumps fitted ,i dont think the van battery will cope .So i want to fit a second battery ie leisure battery ,but sounds like i can run two pumps from that if i have 110 AH . but i dont want to keep taking the battry off to charge it ,as i have to park on the road. So would like to know what is a split charger and what sort of cost Or other alternatives .