batteries how to check (1 Viewer)

[7735]

My 2 leisure batteries (90amp) are now about 7 years old and although they still work when I am not on hook up and relying on my solar panel they do seem to run down to 12.2v quite quickly. How do I check if they are holding their charge, I do have a multimeter which shows when they are charged at about 13.2v. Any advice would be appreciated.

spongy

 

[pappajohn]

two methods.....

1....charge fully then apply a known load for a set time.
A 60w headlamp bub will draw 5 amps so after 10hr will use all the useable power in a 100ah battery.
The voltage should show 12v at 50% discharged.....12v at any less than 10 hours and the battery is failing

2.....get the battery drop tested......by far the easiest method and a garage or tyre fitters may check for free