Powerex PRO High Capacity Rechargeable AA NiMH Batteries (1.2V, 2700mAh) - 8-Pack, (MH-8AAPRO-BH)

The TL;DR is that I'm happy enough with the batteries that, as the rest of my other batteries come due for replacement I'm planning to switch all 30 of them to these.I've been using rechargeable AAs pretty consistently since the early 2000s. It started off mostly being for my camera flashes, but I've been using them in a lot more stuff over the years as the battery tech has improved and as I started using more battery powered stuff. But, in all that time, buying this 8 pack of Powerex Pro batteries several months ago is my first experience with the brand.For the past 15-ish years, I've predominantly stuck with using Eneloop batteries (the regular ones, not the Pro) and they've been OK for me, but now that I'm using the batteries in more devices with motors, they're just not cutting it. The Eneloops will barely spin up some of the motors when they're under load, even when they're fresh off the charger, while these Powerex batteries keep the motors working as hard as they're supposed to. And, for things like my camera flashes, while the Eneloop batteries have been OK, they've never been great because they take longer to charge the capacitors. These Powerex batteries do better there too.Battery runtime is good. As long as stuff runs long enough, which I recognize is a subjective thing, I don't really care about the specific time, so I haven't done a real comparison test. These definitely run long enough compared with all my other batteries that I'd say they're at least as good as anything I've had previously, probably better.Service life will probably be fine, but I haven't had them long enough to comment on that. But, I will say that, if you're concerned about service life, use a high-quality, slower charger. I've been using an Ansmann Energy 16 charger for about 18 years as I'm writing this and when I switched to that charger my batteries began lasting several years longer before needing replacement compared with using a rapid charger. The quality of the batteries is only one part of what determines the service life. I also pull my batteries early if I'm using them in a high-drain situation so that the heat doesn't get a change to affect their longevity as much.I don't think they're being completely honest with setting expectations for the self-discharge rate, which is to say that I don't think that, if I left the batteries sit unused for a year after being taken off the charger, they'd still be at 75%. I haven't done any formal testing to prove the numbers, but I haven't been using the batteries as much as normal this spring and after some were sitting unused for probably about 3 months, my Xbox controller indicated much lower state of charge compared with a set taken straight off the charger and my charger indicated they were below 80%. Normally, I don't let batteries sit without being used for more than a couple of weeks after taking them off the charger, often no more than a couple of days, so it's a metric that doesn't really matter to me, but it's still worth mentioning.

The tests of this, and other NiMh, on the market - indicate easily that these are best-in-class; So, I have been using the Powerex and the Imedion battery with MaHa charger for ten years now; I have discarded a few that fail to test and charge properly after a few years - and that makes the MaHa charger extremely important (it will indicate when a battery can no longer be used reliably);Cycling NiMh such as these regularly is important;And, charge them immediately before you plan to use them;Use the Imedion battery in applications where it may sit un-used for up to twelve months;Use the POWEREX in a daily or weekly-use items such as a camera flash; these are great in a camera flash such as SB600 (fairly large flash);And, the MaHa product line has many other choices; and the MaHa charger can be used on Panasonic Eneloop and any other NiMh battery.Powerex is simply the very best in mAh and long-term reliabiliy (from a ten-year user).These batteries are a very good investment, be sure to get a MaHa charger with them.The first thing you will do with your MaHa is to weed out all of your bad / weak NiMh batteries from you battery drawer and properly re-cycle them; getting rid of the 'weak link' batteries is half the battle; if you have four NiMh ina camera flash, and one of them is weak, it is the same as if all four are bad / weak, because the batteries are wired in series. If you have a suspect battery: discard it (recycle)!Also, MaHa charger can be used to sort and group batteries by their capacity; so you can choose your four very best batteries, for example, for your most critical application; I will sometimes group batteries for my camera flash or for my flashlight, as one example. MaHa also sells a D battery with an insane mAhr rating say for a Maglite or similar critical use;

have used Powerex batteries for live sound applications for years. Just replaced the last batch of these after nearly 2 years use. I've tried alternatives, but for my application these are the best.

I have purchased about 50 of these batteries over the years and although they seem expensive- they are the best you can buy for peak performance and longevity. I use them my speedlites and on-camera trigger in weddings, portraits and editorial news work and I have still yet to figure out how many flashes I can get before they require a recharge! Seriously, no matter how long you use them- the recycle times on my flash remains constant regardless if its my 1st flash or the 200th, the power output is even throughout. I can't tell you how many times I have finished a shoot and then tried to drain them by manually popping my flashes at full-power just to see how many flashes I had remaining in the batteries! I don't ever know, because I get bored, lose count and give up. Seriously. They last for years before they finally go bad (won't recharge) and THAT is why they are inexpensive in comparison to anything else. available

I have ordered several of the 8-packs over the last few years and these always perform wonderfully. The main device I use them in stress them fairly well, so I replace every year and recycle the old ones to XBOX controllers where they live until they..stop living...My last order has 5 batteries DOA but this is first and only time I've received a non-working battery. Even with this experience I'll be back to order again next year regardless.

Powerex is my favorite rechargeable battery. I began using them with a camera and attachable flash for family events like weddings. The batteries could be charged in my car as well in the house chargers. Some of my 10+ years-old batteries are still useable in my remotes. These new batteries are stronger and will last longer in flashlights and automatic motion lights. I like to use rechargeable batteries to cut down on landfill use.