https://www.amazon.com/Idealco-20000mAh-Rechargeable-Replacement-Mountain/dp/B01LHIMXXU/ref=sr_1_1?ie=UTF8&qid=1527274262&sr=8-1&keywords=idealco+10+x+18650+20000mah
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
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