USB Output&Base 【Excellent Cells Quality】Automtive grade cells, pur nickel sheet. Charger: 54.6V 2A. Every Lithium battery have pass the QC appearance and function test before shipment. The Ebike battery charge cycle exceeds 1000 times, ≥80% capacity after 800 cycles 【USB Charger Port】Our battery comes with a USB charging port, allowing you to charge your phone or other devices while riding, making your journey more convenient.