Thanks guys, your explanations on how and when it uses the battery makes more sense and is what I thought prior to reading a few other posts I came across in my searches.
shadow1987, that's a handy tip about testing it at full load. I haven't ever tried that and will have a chat to my neighbours first to let them know to expect it as well. I did leave the cover off for about a week at one stage so I could test it once I saw the fault on the keypad, but like all those intermittent faults, of course it decided to work fine for that entire period! It's currently got the fault showing, so I was able to take the cover off and inspect it while it's in this state.
- No corrosion on terminals
- I ran a multimeter across the battery and it showed as 6.6V.
- There was no charge light on (assuming the charge light you're referring to is between the battery and 12VAC fuses.)
- I removed the battery altogether and measured across the charging leads and got 13.82
- Connect the previous battery that I kept from last time, which was first installed about a year ago and the charging light came on quite brightly. I didn't think of measuring this previous battery before connecting it up again, but once connected it read 10.2V. It had been sitting for about 6 months prior as well and I had, had the same issue with it as well, so I'm not completely surprised by that.
- I've left it in there for now and will see how it charges up and if that sheds any more light.
As for the battery alarmman, it was from a security firm, so should be OK, but you never know and may be a cheapy and causing the problem, but when I Google the code, it's this one here;
Hopefully some of the new details help to zero in on the issue and thanks heaps for all the help so far
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