Tenergy24 Pack Premium Rechargeable AA Batteries, 2500mAh Capacity Double A NiMH Battery, Includes 6 Battery Case Holders

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.

I tried the cheap route first and bought the PowerOwl 8-pack battery + charger combo. It was worth it because the charger is really great, 5 stars for that, but the batteries sucked because 3-4 batteries were dead out of the box or within 30 days. I actually have a review here somewhere on those. The company contacted me and sent me replacement batteries, which was cool, and because that was cool I bought another 8-pack, but they both went 50% dead within a month too. I had similar experiences with Amazon-branded batteries. So THEN I tried the Tenergies, which were a little more expensive, and I have to say, this is a case of you get what you pay for. These batteries work great, and thus far, 6 months later out of the 24-pack there are only three that are going dead, which compared to the others is great! This is with daily use in battery-powered small garden lanterns and electronic devices like handheld game controllers.In summary, I will continue to buy Tenergy brand batteries going forward!

Tenergy is a Chinese manufacturer with a good reputation because they made batteries that could be relied upon in critical applications. They still make decent batteries, but they don't quite have the advertised capacity. Batteries that they made a few short years ago did. I pulled a few batteries that I bought a few years ago out of a device, and put four of them through a refresh cycle on one of my battery charger-analysers and they had almost the capacity they had before using then for a few years, and still within the claimed mAh capacity of Tenergy's premium batteries. These new batteries after a few "refresh" or discharge-charge cycles had only two or three meet advertised mAh capacity, and the rest "close but no cigar."Compare them to eneloops or Amazon basics high capacity batteries of Japanese manufacture, and the Tenergy batteries are close, but not as good. However, bought in bulk in either the AA or AAA formats, they are a good deal. Rechargeable batteries are not cheap. But they are not throw away either. Think of them as an investment. Paired with a good Analyser-Charger that will set you back $50 to $60 and you can be using the same batteries a decade from now. Better for the environment, too. A need for batteries will always be necessary as long as you have good devices that require them.What I see, though is that in the near future, batteries will be placed in the devices you buy, and you simply recharge the devices rather than replace the depleted batteries with freshly charged ones. Think of razors with the batteries built into them, or cell phones, iPad tablets, blue tooth speakers, or any of the newer devices you are buying and using that you charge the built in batteries rather than simply replacing the batteries. So, Tenergy batteries are good batteries. And like many Chinese manufacturers have a tendency to embellish the claims they make about their products. But they make a decent product for a reasonable price.The batteries that powered the bombs used in the Boston marathon a few years ago were Tenergy batteries. That actually helped the authorities track down the brothers. You can't buy Tenergy rechargeable batteries in your neighborhood Walmarts or Targets. But go to a higher end store for hobbiests, or now Amazon, and you can find them. Functionally close to Eneloops without the much higher price.

Good batteries and last quite a while. Always nice to have charged extras on hand.