In the past, I used to always leave one battery in my cameras.
I have a set of photography and videos cameras including some Canon, Panasonic and Sony.
I currently use them every few weeks, sometimes every few months, maybe I used them more often in the past. I usually recharge all batteries just before some events when I know I will use them.
During COVID lockdowns, I almost didn’t use them at all and that’s where everything started going wrong. The batteries stayed inactive in bag in a room that could sometimes get cold… And I had to re-set all the dates (and, if I remember well, all settings had been reset on some of the cameras but not all). The batteries were all still working but they started having weird behaviours (like discharging very fast, or my Canon camera suddenly claiming that one of my commonly used Canon batteries was counterfeit…). So, I replaced most of the batteries by now.
When purchasing some new batteries, some seller recommended me to keep the batteries out of the cameras when not using them and re-charge them every 3 months or so, so that they don’t get completely empty. This indeed helps dealing with some batteries being empty at the time I want to pull out a camera and use it (if I kept them inside camera). But also, now, on all of my cameras, almost every time I want to use them after a few weeks/months, I need to re-set the time again, and again and again. (I think that most other settings remain as set.) (But this also simply happens if I remove the battery and then want to re-shoot something and place back the batteries, after a few minutes, I already need to set the time again.)
So, I don’t remember exactly how this works and what would be the better way to keep all aspects in mind…
- In my memory components may have a secondary small battery to run clocks and so on (I know PC motherboards have one), maybe I need to have these replaced? So, should I sent them to some workshops to do that?
- If these secondary “clock batteries” exists as I suspect and they’re in poor state (which I assume), could it explain a faster drain of a battery that remained inside an inactive camera?
- Should I leave a battery in each camera or should I not?