netster

Well I made a mistake and did not disconnect the negative side of my battery and it died. I tried to jump it, but my cables are cheap. So I picked up a battery tender jr. since I'll need it regardless of what happens with this battery. I've had my battery on the jr for about 24 hours now and the light is still red. The battery is not in the car. Should it be charged by now or is it a goner?

Red99FRC

It will probably take a couple days to charge up the battery with that charger - if it will hold the charge. Keep charging until it's done, or get a charger with a higher charging rate, then put it back in the car, and you'll know right away if you need to replace the battery or not.

Dave68

You can't get it up to full charge with just a battery tender. You will need a battery CHARGER, not tender. 6 or 10 amps should be fine. Battery Tenders are for maintaining a full charge and should never be used to try to revive a dead battery.

netster

Thanks