Unfortunately, I experienced a disappointment with these batteries the first time I used them. However, I do not want to post this as a premature assessment, as it could be an individual or special case. In any case, these batteries were intended to supply energy for a small torch with 9 LEDs ( https://www.galaxus.ch/de/s4/product/schoenenberger-titan-930-cm-50-lm-taschenlampe-14444513?supplier=406802 ). First I fully charged them and enjoyed the green light show. Then I quickly measured the voltage with a battery tester - not in volts, just the pointer position: everything was in the green range, as usual with AAA alkaline batteries. After inserting it into the lamp, I noticed that the luminosity was identical to that with the batteries. But only for a few seconds. After that, it decreased more and more until only a dim glow remained. "The answer to the riddle: 4½ of the 9 LEDs had gone out. What was also noticeable: the housing and batteries had warmed up slightly in the short time - which is not the case with the batteries. Two other Teschen lamps of the same type run without problems with alkaline batteries; despite higher beta power (~8½ minutes compared to maybe 4 minutes), all nine LEDs are still intact. Excerpt from the instruction manual: These batteries are not intended for high-power, high-consumption applications such as high-intensity torches. For high current consumption/high intensity applications, our batteries may not be the best choice. Please check your product for instructions on the battery type recommended by the manufacturer. If your battery feels hot to the touch, stop using the battery in this product as the product is likely to demand too much power from our battery. To protect against damage, our batteries will shut down if they become too hot. For products that are sensitive to RF interference, use only the batteries recommended by the manufacturer. This includes wireless monitoring devices, avalanche transceivers, etc. The PCBA of our batteries emit radio frequencies that can affect the performance of RF-sensitive products. This begs the question: Can LEDs be sensitive to RF or even react with defects?

Question for radio professionals / amateur radio operators: do these batteries emit interference? I have some receiving equipment that needs power sources that are as interference-free as possible. I have these batteries and have not yet noticed any interference, but what do you think?

Batterie ist 2cm gross??

Why is there no guarantee here? Is there a charger integrated in the battery? Is that a fault?

Has anyone used the battery (or similar batteries) in a cat door and have experience? We have these: https://www.galaxus.ch/de/s15/product/sureflap-connect-katzentuere-katzennetz-13596923 And let tonnes of batteries through. I've already switched to Energizer Lithium in the meantime, which covers about 3 months of use (the door is always exposed to temperatures, of course). A colleague has soldered on a universal power supply unit, which is certainly also a solution. But I don't have the confidence to do that at the moment. And with rechargeable batteries it would at least be a temporary solution until he has time and I can do it with him ;-)

Is it safe to use them in series (3v, 4.5v and 6v)? Because a lithium battery "degasses" if it is short-circuited.

How many mAh do these AA / AAA have ? How good are they at temp below 0 degrees ?

Is the voltage really 1.5V, not 1.2V?