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

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

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.

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.

these batteries are great my lights are bright again

Powerex PRO High Capacity Rechargeable AA NiMH Batteries (1.2V, 2700mAh) - 8-Pack, (MH-8AAPRO-BH)I was curious about rechargeable batteries. We have so many choices, so many price points, how do we make a choice. So I decided to do a little experiment. I ordered brand new Panasonic Eneloops (BK-MCCA). The battery claims that it holds a minimum charge of 1900 mAh. The way to think about the charge is "how big is the gas tank". The bigger the mAh, the longer a battery can last. I ordered the Powerex PRO which claims 2700 mAh and minimum capacity of 2550 mAh. I then compared them head to head.How did I compare?To compare the two sets of batteries, I purchased a sophisticated battery tester: https://www.amazon.com//dp/B000RSOV50I set the power to 700 mA and hit charge test. What this does is that it first fully charges the battery, then discharges it completely, and then charges it again to see what the capacity of the battery is. Not an easy process. Four batteries take about 12 hours to test and I was testing 8 Powerex against 23 Eneloops. So it took a bit of patience.And what did the results show?Well, both batteries are made in Japan, and both look nice, in fact Powerex Pro is 4-5 g heavier than Eneloops and comes in a case, but what a difference in the two products. The Eneloops averaged 2030 mAh with standard deviation of 78 mAh. Only 1 of the 23 batteries I tested was lower than 1900. And that too at 1871. In fact, the Eneloops had 6% more capacity than they stated. The quality control was excellent.The Powerex PRO averaged, 1177 mAh, with standard deviation of 133. Note that the tests are identical. I took the brand new batteries and put them in the tester, just like I did Eneloops, and the results were surprising. For those of you who want statistics, I did an unpaired t test, the probability of this happening by chance is very, very small (p<0.0001) . The results tell me that Powerex is 851 mAh lower with 95% chance that it is between 772 and 930 lower.Wait, here is the surprise.I decided to refresh the batteries using a refresh cycle in the charger. Now the results came in more in line. The average power was 2532 with the Powerex, but of the 8 cells, 3 were much below 2550 minimum claim. In fact they were at 1705, 1832, and 1957 mAh. The standard deviation was 602 now.What do I conclude?Well, if you have the time to test Powerex, go for it, because you will find a few strong cells. But if you are looking for overall quality control, the regular Eneloops win. 37% of the Powerex cells were much lower than rated. <5% of the Panasonic cells were below par, and that too within margins of error.Only time will tell how these cells will hold up but this experiment tells me why some folks really love these batteries and others don't. In my opinion, Amazon choice put to the test did not hold up here.Disclaimer: I paid for these products and I do not work for any of the battery manufacturers so I have no skin in the game here. Just trying to get to the bottom of "power game" through some science.