Ideolco 10x 18650 20000mAh 8.4V 7.2V 4.8V Rechargeable Replacement Bike Light Battery Power Pack for Mountain Bicycle Bike Light Lamp Charger + US Adapter Plug

Note: When you received the unit.it only have 30-60% capacitance.you need use up the all capacitance.then keep charging for 14-16 hours for the first.then it can be lasting for 4-5 hours Features: -Battery pack interface:DC5.5 * 2.5mm female -Portable and large capacity -Can be used for bicycle light, headlamp or other devices Specifications: -Material:Lithium -Type:Lithium ion -Model:18650 battery pack (10*18650) -Capacity:20000mAh -Voltage:Fit 8.4V 7.2V and 4.8V -Rechargeable times:Up to 500 times -Application:Can be used for bicycle light,headlamp,etc -Weight:Approx.280g/11.2oz