How to Make a Battery Protection Circuit (over-discharge protection)


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In this video I will show you how to build a simple lithium battery protection circuit, so you can power your homemade projects without ever worrying about over discharging your battery.

Circuit diagrams:

How to use lithium batteries safely:

More info on battery measurements:

Items you'll need:

Alarm circuit:

Relay: DSP1a-L2-DC5V
(select one of the distributors - price is around $5)

Music by Kevin McLeod and Löhstana David
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