what to do with dead battery

[nikhil arora]

it is 12V SLA battery 7A from UPS of computer
I know i should give it for recycle.
the battery is showing 8.5V
can we recondition it so we can work for few days more.
overcharging again or something like that.
I have heard about conditioning or reconditioning of battery.
So it is possible in my case

 

[docel]

SLA reuse

SLA's lose one cell, normally. You can open the cover and identify/isolate the dead cell/s by a jumper and use the battery with reduced voltage. Every cell is worth 2V.
A normal 1/10C charge will let you know if it was a waste of time!

 

[chemelec]

Try charging it, than discharging and re-charging it a few times.
Sometimes that will help.
Discharge it at a Fairly High Rate, but try not to discharge below 10.5 volts.

And do not exceed 14.5 volts on the charge.

If it Won't charge up properly or if it Won't Dischage at a Fairly High Current, It could have a Bad Cell. There is really No Cure for that.

 

[nikhil arora]

it is sealed battery so i cannot open it.
it is showing 8.5V now I think now it won't take any charge but let me try
hope i donot toast any thing.

 

[Oznog]

hope i donot toast any thing.

Any more toasted than it is now?
Just don't set it on fire.

 

[docel]

SLA's are guaranteed to melt, not burn! :!: :lol:
I can post some pics about the postmortem!

 

[nikhil arora]

do send that pics i wanna see from those
I am not going to open my battery
instead i will give it for recycle