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Monitor Battery During Charging

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Talguy

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How can you accurately monitor the state of the battery when its being charged. I have a simple battery monitor right now for a Lead acid battery that works when the charge is disconnected but shows that the battery is a 100% full when the charger is connected to the battery. The circuits is a basic LED bar graph with a voltage divider.
 

MikeMl

Well-Known Member
Most Helpful Member
Are the battery monitor's wire leads separate from the wire coming from the charger (ie connected directly to the battery terminals)?

Pulse the charger on/off; read the battery voltage during the off times.
 
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