Max Storage Time for Unused Li-ion Battery: 7-Year-Old Electronics & Operational Chances

What is the maximum storage time of a Li-ion battery (not the cells themselves, but a complete battery with electronics)?
Is there a chance that e.g. a 7-year-old, never used battery from stock will still be operational?

piotrd76 wrote:

What is the maximum storage time of a Li-ion battery (not the cells themselves, but a complete battery with electronics)?

What's the difference?

piotrd76 wrote:

What is the maximum storage time of a Li-ion battery (not the cells themselves, but a complete battery with electronics)?
Is there a chance that e.g. a 7-year-old, never used battery from stock will still be operational?

I do not know that, but I had such a case with Varta alkaline batteries, but they were normally used after purchase. Batteries bought in 1996 for the flash to take some photos at the wedding of my cousin and used for this purpose. After this "use", they were loaded in a lamp for probably 2 or 3 years (forgotten, not used equipment). Somehow, I just lacked batteries for the remote control and "found" these (R 6 batteries, today's AA) although they were long past the "useful life" date, but still working. They lasted 3 and a half years in the remote control, I was surprised myself that this was the quality and life of these batteries. In my opinion, it all depends on the quality of the batteries, but nowadays we will not find rather super durable ones.

Hello,

piotrd76 wrote:

Is there a chance that e.g. a 7-year-old, never used battery from stock will still be operational?

Since it was unused, it probably has zero cycles on its account.
However, lithium-ion cells (like all batteries) self-discharge. If, for this reason, the voltage of a single cell has dropped below 2 V, its degradation is irreversible.
If the voltages of individual cells are higher - you can try to resuscitate them. You can try to charge them and check their current capacity.

greetings

I have an old 500MHz p3 laptop, the battery is not charging. I have stripped it down and there are nice 3 cells, all of 3.7v. I checked the performance and they are really decent (I need to reset the eeprom in the battery). The laptop was recently turned on on the power supply 3 years ago and for a while, but earlier it was more time aging. Company batteries are definitely worth buying because they are durable (although they are definitely discharged), but not to the same extent as travels because I had them too.

Unfortunately, I cannot check the cells. The point is that I want to revive an almost vintage netbook, and the only batteries that still get into it are old ones from stock, and usually from foreign sellers on ebay. Hence the question whether it makes sense to bring such a battery.

"Unfortunately, I cannot check the cells."
Disassemble the battery and measure each target individually directly with a voltmeter. First, check if they have the appropriate minimum voltage (if so, check if all cells have the same voltage or very close). Even if they have differences (but are not discharged below the minimum) the balancer is equal when charging.