Designed and produced by ECAR Golf.This 48V Lithium Golf Cart Battery – PRO-Li Plus 150Ah Battery Package for Yamaha G19 (Off-board) is designed to seamlessly integrate into all new or existing 48V model Yamaha G19 golf carts. This fully certified, compliant and integrated battery system is best for those looking for approximately 4-5 rounds of golf (or 6-10 hours of use) per charge.*Must be installed by a qualified person, and installation photographs must be supplied for warranty registration to be valid.