If I have used electronic devices manufactured since 1990 and I store them for how many days, months or years without use they can be stored without the risk of this disuse causing any damage and depolarization of the electrolytic capacitors???
: Moved by Moderator
It's like with speed: it's not the speed that kills, it's the sudden stop. So, you can store devices for like 100 years without any problems except dust. On the first power on after some time you should be wary. How long "some time" is depends totally on the hardware and quality of the parts. If there's nothing wet on there, the time is very long. With cheap electrolytics en masse you may get 3 years and it still explodes when powered up controlled and slowly. You may look for people restoring old radios, they know how old hardware behaves and can be revived.