On May 23, 4:46 pm, navti wrote:
AGM Leisure battery 110AH arrived flat
I would return them, salesman lied...

If you wanna test them then:
1 charge them up, use boat charger
2 discharge them, w/a constant load [I'm sure you have an ammeter in
your boat?] Just turn on all the lights, note amp drain on meter.
3 multiply Amps times hours of discharge untill batt is 11V [some will
argue about 11V as "batt=dead"] [note: permanent damage if you go
below 10.5V]
4 If less than 110, return to seller!

You can of course repeat this procedure a few times to see if you get
better results each time, if no Major improvement on second go'round,
stop wasting time...

When testing out of boat, I use an automobile headlamp non-halogen,
they're usually 7-12 amps [you need to measure this with an ammeter].

tom
=-==