iPad 9th generation Battery issue

[Stephen]

iPad battery seemed defective, it would charge then once it turned on it wouldn't charge more. After ordering a battery it would charge then drain very quickly (1% drain every 20 seconds) it then wouldn't take a charge then take a charge when it hit a certain level. I'm assuming it is a defective battery, it doesn't turn off when unplugged but seems faulty. Sometimes when I plug it back in it doesn't even take a charge and keeps draining then all of a sudden it charges. Am I missing something?

[diif]

Re: iPad 9th generation Battery issue

You seem to have charging issues before and after the battery change.
Where did you get it ? Perhaps it's the charging ic/circuitry.

[Stephen]

Re: iPad 9th generation Battery issue

Open box return pallet.

[Stephen]

Re: iPad 9th generation Battery issue

Both batteries seem to not charge however the other battery charged but drained very quickly it seemed.

[Stephen]

Re: iPad 9th generation Battery issue

Installed older battery turns on but doesn’t charge. But turns on then shows 0% all the time but holds a charge then shows 20% afterwards. Defective batteries maybe?

[mon2]

Re: iPad 9th generation Battery issue

Carefully check the voltage to ground of the smbus lines (SCL and SDA) on the battery connector.

[Stephen]

Re: iPad 9th generation Battery issue

Odd request but do we have a schematic for this board