Battery dead but charged in 60 seconds

[Gunnytron]

I am just posting this out of curiosity.

I was tinkering with an OBD reader on my daily. You can;t turn the lights off so within about 10 minutes The battery was dead enough to not allow me to start he car.

I put on my charger and within about 1 minute it said it was fully charged. Naturally I didn;t believe that, but sure enough, plugged it in and the car started easily.

That doesn;t seam right does it?

[MPbdy]

It’s because the battery is dead. It’s not accepting charge anymore and is just surface charging. You can try to charge with another battery in parallel but it’s unlikely it’ll come back to life.

[digitalsolo]

You can try desulfating it.   But I’d agree, surface charge.   Keep an eye on it, it’s probably not long for the world.

[Cobranut]

These are great for maintaining charge and desulphating batteries.  I have a bunch of them on all my off-road and seldom driven stuff.
They're on sale for half price again too.

https://www.northerntool.com/products/batteryminder-plus-battery-charger-trickle-charger-desulfator-12-volt-1-amp-model-12117tc-167981

[Gunnytron]

OK thanks. I might try a "repair" charge with my Noco just out of interest

[Exidous]

You can try the repair but odds are a cell was dropped.