... 3. 4.2kg, Max.20A current 4.2 year warranty 5.with Al alloy case, Charger&BMS 36V Li ... anti-shortcircuit, anti-overcharger, anti-overcurrent, anti-overload3.Compose Type : Injection Technology to make battery more stable4.Certifications : ... management system (BMS) and battery charger7, With short-circuit production function, safe and reliable8, Factory price& High quality9, Fast charging10, Light ...