Dead Battery

[Sasquatch]

K Somehow I turned the key on and left it on my Warrior. By accident or a brain fart I don't know! When I tried to start it I noticed the battery was stone cold dead. Tried to charge it and it wont take a charge.

Have the Optimate3 on it now, reads a sulfated battery and has for close to 8 hours now.

Its a Yusa battery 1 year old give or take. I've drained batterys before over the years but never had this happen. Whats the chance of the battery being pooched?

I dropped in another battery that is about three years old that I bought for another sled and the sled starts and runs fine!

 

[bottlerocket]

The optimate3 will take close to 22 hours to fix that dead battery. Leave it on there and let it do its thing. I love my optimate3 but they take there time and save the battery.

 

[Sasquatch]

Its now starting to charge so things are looking up! Maybe I didn't screw up a 100 dollar battery!

 

[bottlerocket]

Good deal just be patient and it will save the battery.

 

[CaptCaper]

Also if batteries are stone dead they are suspect to freezing someone told me.
good luck

 

[Zakre]

Also if batteries are stone dead they are suspect to freezing someone told me.
good luck

An uncharged battery will freeze, A once frozen battery will never be as good as it once was, it essentially tears it apart in side from freezing, it might some back and work ok, but never will be the same if it did freeze.

 

[Rockmeister]

The guys are exactly correct, a dead lead-acid battery is very subject to freezing among other things.
Freezing will kill your battery.

Let it fully charge before you try starting with it.
If you try to start your engine with the battery while it is half dead, it may permanently reverse the polarity on one (or more) of the cells.
That will kill it.

As a general rule, anytime you run a lead-acid battery dead, you cut the life(& capacity) in half.
1st time 50% life left.
2nd time 25% life left.
3rd time 12.5% life left.
4th time 6.25% life left.

As you can see, letting a lead-acid battery go dead is very bad for it. (And your wallet.)

Even letting it sit at anything less than fully charged will start sulphation.
No matter what charger you use, you can never fix ALL the sulphation, best bet is keep it charged to prevent it.

 

[Sasquatch]

Thanks Rock for that bit of depressing info. The battery is finally charged only took 36 plus hours 12 hours of that was desulphating it! It never froze as the shop was heated while working on the sled. Now have 12 volts so no damaged cells.

I did however freeze a battery once rock solid and it bulged out on all four sides. Thawed it out real slow and after a few days charged it up. Used it for two more years. Usually when they freeze that hard they are done.

Don't know why I would have turned the key on, makes no sense but done is done! Rack it up to old age and brain farts!

 

[Rockmeister]

lol, wasn't meaning to be depressing, more letting people know what kind of things can seriously damage their batteries.

Is ok, I have left my key on also.
Have done about everything on the list and killed my own batteries. lol