Question capacitors storage

[and77man]

where I live, the temperature varies between 33-35C and humidity ranges from 57-67% without rain, and I have electronic devices manufactured in the early 90s. What is the maximum possible interval for me to energize these all devices and for at least how many minutes to prevent failures in the aluminum electrolytic capacitors caused due to disuse??

 

[ZipZapOuch]

It depends on the size of the brand, model number, capacitance, current, applied voltage, charge rate (internal resistance of the cap) and whether you're applying line voltage right away or slowly charging them with a variance.

There is no right answer. Old stuff breaks. Newer capacitors technology is better than old. Aqueous electrolyte ages differently than ionic liquid electrolytes. Even if you answer all of the above questions, there is no single right answer that provides optimized results every time. Many recommendations are wive's tales or based on a single point of data that is meaningless.

Small electrolytic handling small voltage changes last longer than large caps that get hot from rapid charge/discharge cycles. The bigger caps are easier to change so, I'd rather just replace the big ones when needed than worry about optimizing - it's too much work for me - but that's my life, not yours so, play the game as you like.

 

[and77man]

The brands are varied and I can't describe them, but the devices are SNES Fat and Jr consoles, PS2 Slim, 29" Philco and Toshiba CRT TVs, T95 Max Plus TVbox, 5V or 12V power supplies for these devices, LG SATA DVD drives and other devices. I apply the voltage of the device, in this case 220V, opening all the devices, unsoldering all the capacitors, testing and re-soldering. It's very complex.

There are devices manufactured in the early 90s, early 2000s and more recent. The storage temperature I mentioned above is 33-35C 57-67%RH. I don't have air conditioning or a climate-controlled room.