This Hand Pump is compatible with Trojan Hydrolink Battery Watering Systems. Battery watering systems aren't just for golf carts. Any golf cart battery (Traditional Lead Acid Batteries), which can also be found in boats and RVs, solar systems, electric floor sweepers and scrubbers, and even pallet jacks. To get electrolyte into the battery bank, all battery watering systems require a rapid and straightforward one-point fill method. This is a one-click system that makes the work simple. Simply attach one end to the golf cart watering system and the other end to your jug of distilled water. Pump until your batteries are completely charged. Always perform after your batteries have been completely charged.