Laptop charging

[Jane]

If I plug in a charger, what voltage should I measure coming to battery from charger?100% of the output voltage of the charger?Or less?

Is voltage from the charger coming through any charger controller on mainboard?


If I follow this procedure:
I Remove battery
Connect a charger
Measure  voltage on the connector and there is voltage( for a short time),so the path  charger --> battery is OK
Connect the battery
Yet, no charging even though there is a voltage on the battery connector( but not sure if it is coming from the battery or from the charger)

Does it mean the charging controller is faulty? or software problem?


ANd what is a function of the charging controller on the mainboard?

Thank you for explanation

[5321488]

At the output connector of the charger, you should measure very similar to the specified output voltage.

Unless you have modified software for the charging controller, which I can imagine would be difficult, it is probably a hardware fault. The controller will interface the processor, battery and power input to stop charging when full, to prevent overload or overcharge, maybe have a low voltage disconnect - stop discharge when batteries get too low.

Maybe start by visually inspecting the controller, which should be close to the input connector, for any burnt or bulging components?

[Audioguru]

On the other website I said that the "charger" is not a battery charger, instead it is a power supply for the charger circuit inside the laptop. If you connect the power supply to the battery then the battery might blow up unless it has a protection circuit to prevent what you are foolishly trying to do.

You do not even know which connector pins on the battery are +, - or the temperature sensor.

A Lithium battery lasts for about 2 years. When it is worn out then it should be replaced by a good one, not a cheap fake one from ebay.

The charger circuit limits the current and voltage. When it detects a full charge then disconnects the battery from the charger.

[Nusa]

What laptop model?
What battery chemistry?
What voltage did you measure without the battery pack?
What's the labeled battery pack voltage?
What's the measured battery pack voltage?
What % charge does the system report for the battery pack? Will the system run on battery-only?

[5321488]

At the output connector of the charger, you should measure very similar to the specified output voltage.

Unless you have modified software for the charging controller, which I can imagine would be difficult, it is probably a hardware fault. The controller will interface the processor, battery and power input to stop charging when full, to prevent overload or overcharge, maybe have a low voltage disconnect - stop discharge when batteries get too low.

Maybe start by visually inspecting the controller, which should be close to the input connector, for any burnt or bulging components?

Disregard that - I didn't properly read what you were trying to do.

Definitely don't do that, listen to the advice above!