DROK Slim DC 3V to 5V Boost Converter Module DC 2.5-6V to 4-12V Voltage Regulator Buck Converter PSP/Phone Charger 1000mA Max Portable Power Supply DIY

Ofeely Rechargeable 3.7v 550mah Polymer Li-ion Battery for Mp4 GPS Bluetooth 503040 (2 Pack)

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Package include: 2x 3.7v 550mAh lithium rechargeable battery packs 503040

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Product Review

Package include: 2x 3.7v 550mAh lithium rechargeable battery packs 503040

Built-in protection circuit PCM for prevent over charging or over discharging
Size: 5mm(H)*30mm(W)*40mm(L)
Rating: DC3.7V 550mAh

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DROK Slim DC 3V to 5V Boost Converter Module DC 2.5-6V to 4-12V Voltage Regulator Buck Converter PSP/Phone Charger 1000mA Max Portable Power Supply DIY