... (Two-way High Frequency Pulse Battery Reviver /36V) Size : 5.5X9.0X2.5 ... cm Net Weight : 75 g Function:1. Slows down new batteries' sulfation, extends battery ... lifespan.2. Balances battery set voltage, increases mileages apparently.3 ... e-scooters, shopriders using 24V, 36V, 48V lead acid battery.(For use of connection with charger) ...