Bike Bicycle Lights Replacement Battery Pack with 5V and 8.4 Output

  Why you need it?

AAA Grade battery cell, long lifetime.
No need to worry that your bicycle light turn off suddenly in the dark.
Waterproof ABS battery pack, no need to worry riding in the rain .
A external Battery pack for your bicycle light, you need it !

Features For battery pack :

1.IP65 ABS waterproof design,could be used in rain season.

2.2 in 1,could power the bike light and mobile phone at the same time.

3.Different and high capacity for choosing,8800mAh/10400mAh/12000mAh

4.Shockproof ABS polymer casing to endure the toughest impact

5.SEALED Battery pack dual straps mounts on to any bike frame in seconds with a guaranteed secure fit (No tools required)

6.PCB (Protected Circuit Board) Prevents over charge and over discharge for increased battery life