Check instructions on the appliances for battery recommendation. You can get the size and the chemistry. Rechargeable batteries currently available on the market fall into li-ion, li-polymer, Ni-MH, Ni-CD, etc, while primary batteries include zinc-carbon, alkaline, lithium-manganese, and the like.
Choose well-known brands, for example, WINPOWA for 23A/27A and CR2032 series coin cells.
Check the date of production. According to the national standard of China, the warranty period for batteries is generally 1 year.
Observe the appearance of the battery to see if there is any deformation, leakage, or rust.
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