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Universal USB DC 7.4V 8.4V Output 4x 18650 Batteries DIY Power Bank Charger for Cellphone Tablet Bike LED Light

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Product Details
Product Details
Description:
OOTDTY
Features:
The first time you need to install the 18650 battery,then press the button on the back of the circuit board to activate the use of this product.
2x Lithium battery in series directly output 7.4V3A,4x Lithium battery output is 8.4V.
5.5×2.1mm or 3.5×1.35mm port output is DC 7.4V or 8.4V,Suitable Bike LED Light for and more.
As USB charger for Cellphone Tablet and more devices,with DC adapter,easy to use.
With overcharge, overdischarge, overload, short circuit and other protection.

Specifications:
Item Type: 18650 Li-ion Battery Charger Box
Material: metal
Color: Back
Size: 9.3×8.6×2.7cm
input: DC 8.4V
5.5×2.1mm port output: DC 8.4V
USB Output: 5V 2A

Package includes:
1 X DIY Power Bank Box(18650 batteries are not included)
1 X DC adapter








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