Tenergy 24 Pack Premium Rechargeable AA Batteries, 2500mAh Capacity Double A NiMH Battery

I Have over 100 NiMH rechargeable batteries. More than half are Tenergy Premium. The others that have stood the test of time are Panasonic Eneloops. The couple dozen assorted other brands lasted at best a year. I am taken aback by the negative reviews that some people have left. It is sometimes hard to choose the right battery for the application. Some applications need wasteful throw away batteries which irks me. When it comes to camera flashes these are an excellent choice. I have three main flashes and and external and one external power pack. So I pretty much have 24 batteries in flash devices at any given time. I can't tell you why, but flash performance is the best with NiMH batteries. I have had alkaline batteries kill flashes. I don't know precisely why but that's how it is. My other use for AA's is in battery powered motion activated lights which are handy to have in poorly lit areas, I think I have 5 that take C sized batteries, for which I use AA sized NiMH batteries with a jacket around them, to make them physically the same size as C-batteries. Lastly, I have a 48 LED ring light that operates on only 2 AA batteries, and it does great with Tenergys. Maybe not 100% relevant, but I am very impressed with the Tenergy AAA's as well. I Have 3 Brother hand held label makers. They drove my first Tenergy purchase. They each take 6 AAA batteries. How long will a label maker run on AAA rechargeables? I find this amazing: I used up my first two tape cartridges and never had to recharge the batteries! They other two were for other family members, but they are happy with them too. Maybe I am making too big a deal about my good experiences with Tenergy, but when I see ten one star ratings I feel almost offended. And I have nothing to do with the company. These are damn good batteries. And I think the amount of batteries I use qualifies me to say it. If you really don't know how to charge use and store your batteries that doesn't make the batteries bad! I don't mean to be insulting but there should be no three star ratings much less a one star rating. And clearly, if you don't have specific experience with specific better batteries then I can't take those reviews seriously. If you get a damaged product, then get it replaced. If you bought the wrong type of battery for your use, that is hardly Tenergy's fault. One slight criticism: I would only say one thing I believe all rechargeable battery makers should, but seldom do, is to provide re-usable plastic boxes to store the batteries In. LOL- Do you really want 24 loose rechargeable batteries? I order clear plastic boxes, at the same time I order my batteries. Now that I think of it, Tenergy did include the boxes on some purchases because they have the Tenergy brand on them. Hey! Wassup? Start including the plastic cases again!

I originally bought my first batch of these batteries in AA and AAA sizes in 2021. I had purchased expensive Energizer and slightly less expensive Rayovac NiMH AA batteries a couple years before and was not impressed by their short life. Not short in charge life but short in the number of times they could be recharged before they failed permanently. I called both companies and was told about over-charging, high-current applications, temperature considerations, just about everything but why they failed in everyday use around the house in low current devices like flashlights, remote controls and small digital devices. So, I gave up on the national brands and bought a 24 packs of Tenergy AA's and AAA's along with their associated Tenergy 16 position AA/AAA charger and I couldn't be happier. This purchase of 24 more of each size is not for replacement of the original order but supplement to as I needed more of each. I have replaced all of the batteries in my home with these batteries and they have performed exceptionally. They are long lasting, charge well, hold their charge in devices that have a lot of stand by use (like flashlights) and I have had no failures in the 3 years of use with many, many recharges. These are superior NiMH batteries and are significantly less expensive than the natiuonal brands availble at big box stores. I heartily recommend these Tenergy NiMH batteries.

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.

To be honest they do the job haven’t had any problems been using them for a while

Speedy delivery, great pricing, item as described.

Charged up to capacity and seem to last well. Would buy more.

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The batteries seem well built, I have only run them for a few cycles, but my initial feeling is they are quite good. The capacity of the cells is increasing gradually, which is expected. Overall, if these show good long term performance I will buy another pack as the value is very good. EDIT: After some time these batteries have shown very poor performance! You charge them, then a few days later, they go flat despite not being connected to anything. almost half the cells that cam in this bundle were defective and have progressively gotten worse with time and charge cycles. I would not recommend these at all. Spend money buying quality batteries, this was a wasted attempt!