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Where could a new doorbell button be located?
ByCharly7
This is what our entrance looks like. The doorbell button is clearly visible below the mailbox. So far, everyone has found it. But now, there are increasingly bigger delivery drivers, and then: The doorbell button is "gone." I asked, but they really can't find it! Where else could I install one or how could I…
Can someone explain to me how to solve this diode & co problem?
I would be extremely grateful if someone could explain to me how to calculate and so on. Ptot = 12.5W
Why does the human body close an electrical circuit?
ByFlock330
During my training, I recently got an electric shock while winding up a cable drum. The insulation of the L1 was bare. I wonder why a bare cable on the floor doesn't conduct electricity into the ground, but my body has to be between them. Plugging a cable into a socket with its bare end…
How do I show that the equation is true?
Bysarah53a
How can I show that the following is true? thanks in advance!
Backlight on old notebooks?
Hello too. I heard somewhere that old flat screens and notebooks used mercury vapor lamps. Is that really true? Nowadays, we only know LED backlighting. Would that pose a risk of mercury leakage in older devices? Thanks in advance. Regards, Dirk
With every store/discharge, chemistry changes in every(!) Rechargeable battery to the detriment of the capacity – in principle and irrevocably. For some, it takes longer (especially LiFe…) they are more expensive.There are devices that try to “save” with tricks and special loading, unloading methods, but with moderate to no success. At Li-Akkus nothing really successful is known to me.
Not at all. If a battery has lost its capacity, it must be disposed of. Open. Good batteries can be charged 1500 times before they have only 80% of the capacity. LiFePo4 even 3500 times.
Not at all!
Unfortunately, that is not possible.
The battery is becoming weaker and worse.
Batteries refreshen: New life for smartphone and laptop?
https://www.akkushop.de/en/news/akkus-refreshen-neues-leben-fuer-smartphone-und-laptop/