down tube hailong battery pack 48v 17.5ah 840wh electric bicycle battery for vaun mifa prophete phylion

product description
1. with usb port can charge cell phone and bluetooth speaker
2. new slim shark style case battery with power button
3. convenient charge port support 2a 3a faster charge 4. waterproof and solid plastic case
5. lighted battery led power indicator
6. lock with keys securely locks the mount on bike frame.syi