Tenergy Premium Rechargeable AAA Batteries, High Capacity 1000mAh NiMH AAA Batteries, AAA Cell Battery, 24 Pack

Even though only about 8 of the 52 batteries I purchased since April 2017 still take a charge, these batteries are receiving a five star rating because the reason these batteries no longer take a charge is due to an error on my part. So here is the story. I shopped around for a while in my usual detailed and systematic way and finally decided to purchase these batteries, starting with a 4 pack of AAAs on April 12, 2017. The batteries worked well, so on July 17, 2017, I purchased a pack of 12 AAs. So far, everything was just fine, but I was about to make a mistake that would lead to the eventual destruction of the 16 batteries I had already purchased - and the 36 batteries I was about to order. On December 21, 2017, I ordered a 12 pack of AAAs and a 12 pack of AAs. Unfortunately, I failed to read, and or heed, the instructions printed on the side of every one of the batteries, "Caution: battery can explode or cause burns if overcharged, disassembled or exposed to fire. Do not mix with used or other battery chemistries (alkaline, lithium). Even though I had previously habitually labeled new batteries with their date of purchase, etc., I didn't even think about it when I received the 24 new batteries, and simply put them into service with my existing batteries. By April 2018, I was increasingly disappointed with these batteries because I had already had a few individual battery failures. But I needed more batteries and didn't have time to perform new research to find a new brand, so I placed another order for 12 AAAs on April 26, 2018. The April 2018 order meant that I owned 52 of these batteries, 24 AAs and 28 AAAs. Once again, the new batteries were not labeled before being placed into circulation with the existing 36 batteries. My rechargeable batteries receive heavy use, and previously battery sets purchased at the local grocery store had provided sometimes amazing longevity (up to about 10 years), apparently because I was taking steps to ensure they were recharged regularly (at about 50% discharge). I had hoped to have similar success with the new batteries, but I had never purchased batteries in such large sets. While the differing brand, newness, and external appearance had made it easy to recognize which of my old batteries belonged together, there was no way to tell which of the new batteries had been purchased at what time. By mid-summer, 2018, the new batteries were failing at an alarming rate. Returning to Amazon to read the reviews, I hoped to find out if other customers were having similar problems and to try to figure out if I had missed reviews discussing such a large failure rate. But there were virtually no reports of failures, let alone enough failures to qualify as a rate. Disappointed and frustrated, research began to find a more reliable replacement. Then one day I happened to carefully read the second sentence of the caution warning on each battery, "Do not mix with used or other battery chemistries (alkaline, lithium)." Suddenly, it was clear that although the batteries had not been mixed with other battery chemistries or brands, 3 sets of new batteries had been intermixed with 2 sets of used batteries. Then it became clear why the batteries were failing at such a high rate, the used batteries were apparently damaging the new batteries, and or the new batteries were apparently damaging the used batteries. In an attempt to recover, I tested my remaining batteries and created sets with similar voltages immediately after charging, but the damage had been done. Today, some 20 months after the first order, only about 8 of the original 52 batteries continue to take a charge, and even these continue to fail at an accelerated rate despite the attempt to match them. Therefore, it appears re-purchasers of these - or any other sets of rechargeable batteries - should be diligent about labeling or taking other steps to ensure that new and used batteries are not utilized together to power equipment. Labeling rechargeable batteries with date, order number, tally marks, spray painting, etc. may take a few minutes, but the batteries, and money, you save will be your own.

The obvious benefits of rechargeable batteries are saving money and reducing waste, BUT the benefit I like most from using them over the years is that we never run out of batteries in the house. There's never a time that a remote stops working and we don't have any AAA's or AA's to get it going again. We've always got fully-charged Tenergy Premium batteries ready to go. As soon as we change out a battery, the old one goes in the charger until fully-charged and goes into rotation for the next use. I can't imagine ever going back to buying throw-away batteries. Why Tenergy Premium? Because it fits the need for our house perfectly. We've always found Tenergy to be reliable and an excellent value for the money, and the Premium Batteries to be long-lasting in storage while providing plenty of power for the things we use them for. We use them for things like remotes for TV and other devices, smoke detectors, flashlights, vintage electronics, and anything else requiring batteries. I highly recommend the Energy Premium Rechargeable batteries for any household, and make sure to get one of the Tenergy chargers which are optimized for their batteries. We've been using Tenergy for many years, and haven't found anything negative about them.

These have saved me money. I’ve had them almost 2 years and recharged them countless times and they still recharge to full strength. I’m using them in small puck lights that tap on and off that I use in closets and dark cabinet corners so some get a lot of use while others just maintain the charge without much use. Either way, I’m impressed with how well they work and have held up. I just reordered another set to use in my other electronics after seeing how well they’ve held up in the puck lights. Of course they need to be recharged periodically depending on use but then they’re good as new again. Definitely a cost savings and worth the small effort to recharge them when needed as it maintains the full brightness of the lights that way. The puck lights I use are inexpensive plastic and not the most exacting specifications, but I’ve never had an issue with these batteries fitting in the space allotted to them. The manufacturer did a good job with these.

I got these because I feel like buying disposable batteries are bad for the environment, but most tv remotes require AAA's. I had an existing NiMh charger that takes both AA and AAA batteries and I've heard good things about Tenergy batteries so I'd thought I'd give these a try. At first charge, my base unit did not detect around 5 of the 12 that I received. I thought that they were defective, so I contacted customer service. They were more than cooperative and told me to try jiggling them on my charger first; I complied and sure enough, it was user error. All 12 batteries were functional. To test them out, I decided to run an LED flashlight that takes 3 AAA batteries and see how long it lasts. It's been around 3 hours so far and the lights are still on (sure LED flashlights are fairly efficient, but I feel that if I can get at least 3 hours on a flashlight, I can surely get good performance on a TV remote). All in all, I'm satisfied with these batteries.

I've been using Tenergy batteries for a couple years and I needed more for the new ceiling fan remotes that I just had installed recently. I robbed other remotes and so now, I have some charging and will be all set. The batteries last forever, plus the charger is fast. Well worth the money and saves me plenty from buying from the store when who knows how long they've been there.

Bought some of these batteries 12 years ago and most still working well still. Best brand I have found, better than name brands.

I have 6 Panasonic cordless phones located in various rooms in our house that we can use as an intercom network. The original Panasonic NiMH batteries had a stated capacity of 550mAH. They were old, and either no longer held a charge, or died after a minute. I replaced all the original batteries with the batteries that I got in this order. These have a rated capacity of 1000mAH, almost twice what the originals had.

I have these expensive in ground solar brick lights I installed in a hardscape. First set of 4 bought in 2010. Even with new batteries 3 of 4 just stopped working. I bought a new set of 4. These solar bricks are not your average plastic solar path lights. Anyway, I was so disappointed with this new set. The lights did come on at dusk but only stayed on for 2.5 hours. Before I returned them I thought perhaps it was a problem with the generic batteries the manufacturer uses. I purchsed these Tenergy batteries. Wow! Now these solar brick lights come on at dusk and stay perfectly bright all the way until dawn. More than 12 hours (in California in December). During the day the sunlight re-charges them. Beyond impressed!

Buenas baterías, las uso para un medidor de presión arterial, y duran un poco menos que las baterías alcalinas

Ce sont de très bonnes batteries rechargeables. Bien sûr faut les rechargés souvent mais tu vas faire longtemps avec tu vas sauver de l’argent et l’environnement. C'est idéal pour les jouets d'enfants. Conseil: achètes-en un peu plus que tu penses en avoir besoin et trouve toi un bon chargeur et assure-toi de toujours avoir des batteries sur la charge. Comme ça tu es toujours plein d’énergie!

The batteries are excellent but I received only one empty box.

They will hold a charge for months, possibly a year in storage. This is based on past experience. I have some Tenergy aaa batteries that are 7 years old and after a year in storage, they still have some of their charge. I did have 2 that did not hold any of their charge for that long, but I don't know if it was the batteries of user error. The new ones arrived holding most of their charge but I don't know how long the seller had them in storage. Fast delivery. I ordered on Nov. 3rd and they arrived on Nov. 6th.

Batteries work well and capacity is pretty close to what is stated, although a few more charge / discharge cycles may be needed to reach full potential. Had a minor shipping issue which seller handled promptly. Great customer service! Keep it up Tenergy!