ctech are the best.

Brand of battery was Motorbat, or something like that, and live on the central coast nsw, so not hot.

Have not used that brand, but think someone I know mentioned he was using one and it was yellow. as long as they are giving you replacement battery free as think he said two year guarantee . but not normal , so check out everything in charging system on your bike tight plugged in & all terminals clean & everything is working as it should. c-tech has always worked for me, but a few months back I had the positive terminal break off & no power to start my sporty, but the battery was not flat. that battery your using same type AGM , I prefer just has less CCA. hope you solve problem.

what size ctek charger are you using ? (amps)

Almost any of the ones with an LCD screen can be set up with hours/days/weeks:

Thanks HOG63, I'm onto it now.

The jiffy stand theory sounds pretty wild considering charge leaves possitive and returns negative. Try taking off your negative lead & put your multimeter between neg lead and neg battery terminal set ur cables to amps and if there’s a drain it will show some amps on your screen. Ignore anything under 0.2amps