* Color: Blue
* Polymer Lithium Battery: Bluetooth,MP3,MP4,MP5
* Battery capacity: 550mah
* Voltage: 3.7V
* Size(mm): 50(L)X30(W)X4(H)
* Net Weight(g): 28 g
Feature:
Long cycle life
High energy density
Low self-discharge
Low internal resistance
Non-toxic, environmental friendly
High safety, no explosion
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