The standby time of battery" target="_blank">lithium battery, if the time is getting shorter and shorter, proves that the lithium ion battery pack is aging.

You can attach this load to the positive and negative terminals of the battery, and measure the voltage drop of the battery, that is, measure the voltage before connecting the resistance. After measuring the voltage is connected to the load, the smaller the difference between the two voltage values, the larger the capacity of the battery, the stronger the load capacity.

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