This FandyFire 8.4V 4000mah Waterproof Bike Light 4 x18650 Batteries Pack will provide ultra brightness to your bicycle lamp! It could accommodate 4pcs 18650 batteries, sending out soft and bright light. With particular design, this battery pack supports excellent waterproof performance, over-voltage protection, over-charging protection, over-discharging protection and circuit protection, rather safe and reliable to use. It is so portable for convenient carry and use. Not miss it out!<!--Features --><p>FEATURES</p><ul><li> Support 4pcs batteries to store in</li><li> Premium materials with delicate treatment</li><li> Handy size, lightweight for convenience</li><li> Outstanding waterproof performance, fit for outdoors</li><li> Offer power supply to bike light instantly</li><li> Support over-voltage protection, over-charging protection, over-discharging protection and circuit protection </li></ul><!--Specifications --><p>Specifications</p><table width="100%" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td width="131"> Brand</td><td width="365"> FandyFire</td></tr><tr><td width="131"> Quantity</td><td width="365">1pc</td></tr><tr><td width="131"> Color</td><td width="365"> Black</td></tr><tr><td width="131"> Material</td><td width="365"> Silicone+ Lithium ion</td></tr><tr><td width="131"> Cell Type</td><td width="365"> Lithium Ion</td></tr><tr><td width="131"> Battery Model</td><td width="365"> 18650</td></tr><tr><td width="131"> Head Type</td><td width="365"> Flat Top</td></tr><tr><td width="131"> Mark Capacity</td><td width="365"> 4000mAh</td></tr><tr><td width="131"> Measured Capacity</td><td width="365"> 4000mAh</td></tr><tr><td width="131"> Voltage</td><td width="365"> 8.4V</td></tr><tr><td width="131"> Rechargeable</td><td width="365"> Yes</td></tr><tr><td width="131"> Rechargeable Times</td><td width="365"> 600 Times above</td></tr><tr><td width="131"> Built-in Protected Circuit</td><td width="365"> Yes</td></tr><tr><td width="131"> Over Voltage Protection</td><td width="365"> Yes</td></tr><tr><td width="131"> Short-Circuit Protection</td><td width="365"> Yes</td></tr><tr><td width="131"> Over-Charging Protection</td><td width="365"> Yes</td></tr><tr><td width="131"> Over-Discharging Protection</td><td width="365"> Yes</td></tr><tr><td width="131"> Mercury Free</td><td width="365"> Yes</td></tr><tr><td width="131"> Dimensions</td><td width="365"> (2.76 x 1.57 x 1.57)" / (7 x 4 x 4)cm (L x W x H)</td></tr><tr><td width="131"> Weight</td><td width="365"> 5.78oz / 164g </td></tr></tbody> </table><!--Package Includes --><p>Package Includes</p><ul><li>1 x 4-Piece 18650 Battery Pack </li></ul><!--Extra Info --><!--produts_compatibility -->