Sealed Lead-Acid battery discharge limit?

[elecfriend]

I am using sealed Lead acid battery 12V, 2.3AH. If battery low circuit is NOT used, it discharges as low as 3V. Is it harmful? should I use low limit protection circuit? if yes, then upto what level?

 

[jimlovell777]

You just asked that a few days ago: https://www.electro-tech-online.com/threads/sealed-lead-acid-battery-discharg-limit.105787/

Reply to your original thread if you were looking for a different/better/more detailed answer.

 

[Boncuk]

Hi elecfriend,

a 12V SLA-battery is as dead as it can be if it discharges to 3V.

The very low limit is 1.8V per cell, 10.8V total for a 12V battery.

 

[MikeMl]

Hi elecfriend,

a 12V SLA-battery is as dead as it can be if it discharges to 3V.

The very low limit is 1.8V per cell, 10.8V total for a 12V battery.

An Automotive starting battery is permanently damaged and will have to be replaced if discharged below 11V (1.8V per cell); a "deep-cycle" battery shouldn't routinely be discharged below 10.8V, otherwise life will be shortened.

 

[Boncuk]

An Automotive starting battery is permanently damaged and will have to be replaced if discharged below 11V (1.8V per cell); a "deep-cycle" battery shouldn't routinely be discharged below 10.8V, otherwise life will be shortened.

I know and that's why I wrote "very low limit".

 

[Hero999]

I told you before, your 12V battery is knackered if it's discharged to 3V.

Send it away for recycling and buy a new one. Don't dispose of lead acid batteries in the household waste, they contain lead which is bad for the environment.

The minimum discharge voltage will be on the datasheet.