Why you can get lower Price : 

1)They don't do aging testing when assembling ,it will save 80% workers charge and save 100% electric .

2)Because they don't do aging testing ,so maybe you will receive 10%  defective products.

3)They will not pick out scratch casing ,so it will save 5% cost .

Why some supplier give you very low price :

 Because they use Fake Li-ion battery as below :

Any questions ,fell free to call :+86 13165939787  contact person :kobe chen     skype:powerbank1990   wechat:13165939787 

Learn More Product from our website:http://kqbattery.en.china.cn