At the time of project approval, it was 40mAh. This product wanted to be as small as possible, so the plan was to use button batteries. Originally, I wanted to use Yanjiu, but Yanjiu button battery factory is still in Hubei Province, ready to move to Jiangxi. At present, the production is in Yanjiu, a processing factory in Dongguan, so Yanjiu battery is not used in the end. Mr. Jin Tian recommended M1054 series batteries to our company, so this battery was finally used. Even if 35mA is used, it can be stored for one year. However, the working hours will be relatively less.
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