?<strong>Features:</strong><br />18650 rechargeable lithium battery pack.<br />Battery pack interface: DC5.5 * 2.5mm female.<br />Portable and large capacity.<br />Can be used for bicycle light， headlamp or other devices.<br /><br /><strong>Specifications:</strong><br />Material: Lithium<br />Type: Lithium ion<br />Model: 18650 battery pack (4*18650)<br />Capacity: 4400mAh <br />Voltage: 8.4V<br />Rechargeable times: Up to 500 times <br />Application: Can be used for bicycle light， headlamp， etc.<br />Item size: 6.6 * 3.7 * 3.7cm / 2.6 * 1.5 * 1.5in <br />Weight: Approx. 207g / 7.3oz<br /><br /><strong>Package List:</strong><br />1 * 18650 Rechargeable Lithium Battery Pack<br />1 * Battery Pack Bag