XTAR AAA Rechargeable Battery Triple AAA Batteries Rechargeable 1.5V 1620mWh (8pcs 1620mWh 1.5V AAA)

Charges to over 1.5vdc, hold charge, using them in my TV remote, (lasts over a week now) was changing every 3 days! Also using in my NEST Thermostats, last over 3 weeks now, still reading over 3vdc. Other brands I tried would not charge over 1.3 - 1.4vdc.

Very good! These weren't my first choice but the other brand was sold out, so I went with these and they work perfectly! They charged up quickly and work very well and have a good battery life.

I bought these for my Kyosho Mini Z RC car. These batteries will unlock more power and make your car a little faster if your purchasing them for that reason haven't got to use them very much but so far from what I can tell they are good batteries. I haven't used them for anything else but I assume they would last longer in TV remotes and other devices than standard alkaline batteries.

So far so good. I tested every one of these batteries and they all tested to their advertised mAh rating. I've been using NiMH for almost 20 years in various capacities and they always left me disappointed by the 1.2v voltage. These Li-ion replacements seem to be a great replacement. I have noticed that they get pretty warm in high current applications like my LED flashlights. The cell inside the battery package is a 3.6v li-ion. To get 1.5v the package includes a buck converter which regulates the voltage down to 1.5v. This means the voltage discharge profile is very flat. This is great since you don't experience weak batteries towards the low end of charge. Unfortunately this also means that when the battery is discharged, it drops voltage immediately and vive little to no warning.

What is there to say? They are great little batteries that hold up as expected. The case they come with helps keep them nicely together and you can just toss them into any bag and be able to find them without being lost in a drawer or your luggage.

I was initially impressed with these batteries. I did an initial capacity test and was pleasantly surprised that the ones I received measured 1420 mWh. Less than specified, but the highest I've measured hands down. I also tested them for "low power, always on" behavior and was impressed at their longevity. Add to that they are not oversized, I thought they were fantastic. Then I started putting them in real devices and that's where the disappointment came. In more than half of my devices, they simply don't work and it quickly became obvious as to why. The bottom of the battery is where the negative terminal makes a mechanical connection, and the button top is where the positive terminal makes the positive connection. Many AAA powered devices employ a coiled wire spring to force the mechanical electrical connection to one or both of these points, often the positive connection. Many AAA powered devices employ a flat plate for the electrical connection at the bottom of the battery. These batteries create a major problem at both of these points because of the following. The plastic wrapping material overlaps the base of the battery at the negative battery terminal, and a flat metal plate will touch the plastic, not the metal, and thus not make a reliable connection or any connection at all. If a coiled spring is used for contact to the positive button terminal, most coils are much larger than the button top on these batteries and simply make contact with the region between the button and the edge of the battery which is an insulator in the case of these batteries. You can see these issues in the pictures provided. I checked all my name brand consumer AAA batteries and none of them have either of these issues. They have metal at the region between the button and the edge of the battery, and a wider button to begin with. So the spring coil will always make good metal to metal contact. And, none of them have the negative base encumbered by overlapping plastic. There are devices that have flat spring tabs or plates that will work with the button tops, and springs at the negative terminals which will work with these batteries. But for me that's the minority of my devices. I used some folded tin foil inserted on both ends to make the connections work to prove my observations and it was successful, but that is not recommended for actual use as it can short out the battery, and if the battery protection circuit does not blow open when shorted, the lithium may burst into flames that cannot be extinguished. I then used a voltage meter to check the top corner of the battery (with the plastic peeled back at the very top) with the top button positive terminal of the battery. Sure enough, a solid 1.5 volts. This means, if a deformed coiled-wire spring was to bend sideways during battery insertion, and pierce the plastic coating near the corner, and make contact the the button, it will short the battery out. If you then put the device in your drawer, or your suitcase on an airplane, it could become quite a dangerous situation.

These batteries are excellent. They even simulate a weak battery when the battery is at 20% so your device will alert you to low battery. Now, having said that, they are way too expensive. Double the price of others from good brands.

Nice product. I bought this in 2025; up till now, none have failed. I recommend it.

BB nomás pk baratas no están... Si pienso seguir comprando esa marca