Deep Discharge Protector for 3.6V Li-Ion Battery

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https://www.electronics-lab.com/deep-discharge-protector-for-3-6v-li-ion-battery/

A rechargeable battery’s load should be disconnected at the point of complete discharge, to avoid a further (deep) discharge that can shorten its life or destroy it. Because a battery’s terminal voltage recovers when you disconnect the load, you can’t simply disconnect the load when the terminal voltage dips below the established threshold and then […]

Disconnect circuit for 12 volt lead acid and lithium batteries

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https://www.electronics-lab.com/50967-2/

KA7OEI designed a circuit that disconnects the battery when it over-discharges. He writes: The avoidance of overcharging is usually pretty easy to avoid: Just use the appropriate charging system – but overdischarge is a bit more difficult, particularly if the battery packs in question don’t have a “protection board” with them. Lead acid batteries (almost) […]