1. Brand

　　When purchasing polymer lithium batteries, you should look for well-known brands. The quality of batteries can be guaranteed. Although many small brands of batteries are cheap, they have short life and unstable quality.

　　2. Capacity

　　Check whether the capacity is clearly marked. The battery pack without clearly marked capacity (such as 1000mAh or 1000 milliampere training time) can be used as low-quality battery pack or recycled battery pack without quality assurance.

　　3. Protective plate

　　Without a protective circuit board, polymer batteries are in danger of deformation and leakage. In the market competition, various companies seek to protect the circuit board at a lower price, or simply omit this device, making the market full of explosive polymer batteries.

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