Tenergy Premium Rechargeable AA Batteries, High Capacity 2500mAh NiMH AA Battery, AA Cell Battery, 12 Pack

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!

Most of the Tenergy batteries I purchased last 10 years or more. Compare that with others that will last 300-800 charges (even when they claim 1,000). The ones that survived over 12 years old don't have the capacity of new ones anymore, but still have as much power as your cheapest alkaline or carbon-zinc (heavy duty) batteries, so are still useful. Of course, use a smart charger to make them last long. But I have used dumb cheap chargers with them too in a pinch or when the smart charger was full, but no more often than I really have to.I've never had to deliberately fully discharge these NiMi for them to hold a full charge. "Memory-effect" is much less a problem than with older NiCads. If they're run down just once in a great while... like at least every couple of years, rather than just topping them off all the time is good enough to avoid any memory effect. In another words, you may never have to fully discharge these before charging them. Over the course of 2 years of using them, you will have probably run them down low enough anyway through normal use at least once, & that should be all you need to.These aren't their low self-discharge or pre-charged versions but mine did arrive with a charge still on them. These newer formula/design ones have sat around for 3-4 months & still had plenty of charge left. So you don't have to recharge these every month or 2 if they've been setting around unused for a while. But if you want the maximum run time out of them, especially in high drain devices you really should recharge them after a couple months. Top them off before you're going on a long trip, or expecting a storm that may knock out power.Low self-discharge batteries can still hold plenty of power after being stored from a year, but don't expect these to have much power without a charging them for a year. I have accidentally left them in a low-drain LED light for about 6 months, & they still had enough power to run them for several hours (about 1/3 their normal fully charged run time).So it you're going to put these in devices that you rarely use & forget about them for more than a couple months up to a year, get their low self-discharge versions instead (they work great too).These have the advantage of being a little cheaper than low self-discharge ones, & have a higher AH (power) rating. So as long as they're used within a month or so since they were last charged, the will run longer than the low self-discharge ones.Batteries of other types will eventually leak & damage your device if they sit in them too long, get old, are an odd brand, or a factory defective battery. These will not leak ever.