Lithium Polymer Battery Power Bank

1. Buy power banks from qualified factory,do not focus on cheap price only. Batteries, circuit boards have certain fixed costs, higher quality batteries, the higher purchase cost.
2. Better choose poly-mer batteries. Polymer batteries output efficiency is relatively stable, but also has a light weight, safe and efficient.
3. Consider shell beauty at the same time, pay attention to the shell strength and heat resistance.
4. Do not just focus on the conversion rate.

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