Can I slightly hijack this thread as it's related?
I'm not a heavy vaper, 1ml a day if that really, so my twist can go 3 or so days before I charge it. With regards to my back-up batteries how long do they keep charge for unused? Do they even lose charge unused?
I have 2 spare so one barely gets used but unsure if I should charge it after X days so it isn't flat if I need it if my back-up goes tits up