Powerex Low Self-Discharge Precharged AA Rechargeable NiMH Batteries (MHRAAP4)

I've owned several sets of Powerex batteries and they have always performed well. This review is specifically for the Powerex D cell 10 Ah variety. I bought these in 2016 and as of 2023, they are still working well. Capacity as reported from my Opus charger is still around 9970 mAh, which I think is great. Although I have them 8 years, I probably only charge them about 4 times a year, so they haven't been cycled too many times. When I bought these, they cost about 60% of what they do now. Given that in the devices I use these in that I would have gone through about 4 sets of regular D cells per year, the breakeven for me came after 2 years, so despite their high cost, they have still saved me quite a bit of money. I was kind of shocked to see the price of them now, so that would be the only negative, but I guess you get what you pay for. They are true D cells with the corresponding higher capacity, not C cells that have been put in a D cell case. If you don't need the kind of capacity these provide, you can save some money buy buying the lower capacity cells, but if you do need the higher capacity, these work very well.

these are the batteries that you can depend on, i purchased several powerex batteries and i used them to power my eton field radio and they are very reliable, doesn't drain fast and if I may suggest use the powerex mh c808m charger designed to charge d cells, for quite sometime these d rechargeable batteries were out of stock finally amazon replenish their stocks and iwas able to order several packs of these batteries, low self discharge rate is added feature since the radio that I am using them with consumes a lot of batteries, somewhat pricey but I believe they are worth the investment in the long run, a much better alternative for alkaline batteries which are quite expensive and sometimes, they leak which will damage your equipment. these batteries are quite hard to find and different stores do sell them but with added costs, sometimes you will be charged with the shipping, almost one third of the cost of batteries. amazon ships it for free most of the time. I do hope that amzon will re-stock the mh c808m and the powerex 100 minute cool chargers, grateful to powerex and amazon for leveling the playing field!

I still have AA 2700 and 2800 mah batteries that are over 10 years old that still work in low discharge. Yes they are pricey but much better value than the cheaper batteries that you can find here. I measured the capacity using the MH-C9000Pro charger/analyzer/conditioner and they all came up to over 1000mah after 3 charge and discharge cycles. I've tested a few different brands of AA and AAA(energizer, tenergy, etc) and they all come up short in the tests. I've not tested capacity of C or D batteries yet because my unit is unable to test them natively but I did buy some adapters that will connect to this unit and able to charge the 10,000mah D batteries. I use some "fake" C size batteries that really only have about 1500mah of capacity for an inflatable bed that I use a few times a year. The batteries are just enough to inflate so it's not like I need HI capacity C batteries for anything. I am curious though, I would love to put to the test the real C and D batteries, but I rarely use them, so the cost is too expensive for me to buy these to use twice a year. So if any of you would like to send me 1 or more C or D batteries to do an engineering analysis on, I would be more than happy to discover which C/D batteries have the highest capacity. I can also test 6 months later, how much capacity is left. I will be posting the actual picture showing total capacity for each battery after the cycle. I charge at .25C and discharge at .5C. Meaning it takes 4 hours to charge and 2 hours to discharge. I used this device to measure capacity and break the batteries in. https://www.amazon.com/Powerex-MH-C9000PRO-Professional-Charger-Analyzer/dp/B08DJDQ4Y8/ref=sr_1_2?dchild=1&keywords=powerex+charger&qid=1601666623&refinements=p_89%3APowerex&rnid=2528832011&sr=8-2

WINNER POWEREX - I Bought Panasonic, EBL and Amazon Basics Which Were Terrible I fully charged the Panasonic and Amazon Basics rechargable batteries and lightly used them and they both were going bad in less than 2 days. I was ready to give untill I saw the Powerex AAA rechargable batteries and decided to buy them. I charged them up and and they are still going strong after a week. I finally found a company that makes good quality batteres. Conclusion: Do not waste your money and time and just buy the Powerex Precharged Rechargeable NiMH Batteries which are the best.

Arrived charged and I let it sit for a few weeks; still good but not fully charged. I topped it off and it held the charge well. But when it dropped off in use, it dropped off quickly. Not surprising, that's been my experience with other rechargeables. I'll probably buy another so I always have one charged up. I'm using it in a wireless belt pack for in-ear monitors. My charger is also a Powerex that I used for earlier versions of Powerex 8.4v batteries that finally died after several years of use.

Works on my (ancient) Empi Tens unit, although it's a bit thick. Since you can't get the actual Empi batteries anymore, these were about the only ones that I came across that had the right voltage and were close enough in depth to actually work in the Tens case. And, they do work. I did have to move the little fabric battery pull in the tens battery compartment out of the way, but after doing that, they fit without a problem. And, the PowerEx charger is much better than the original EMPI tens battery charger, so I expect these batteries will hold up better than the Empi ones did over time.

I should try out the AAA format of these because they are working very well for a cordless razor, giving me far better lifespan than alkaline batteries I had been using because I couldn't find a good AA rechargeable.

Batteria utilie per diversi utilizzi. Consigliata!

Me encantó este producto, viene con su empaque para viaje de plástico que me encanta. Los uso para flashes speedlite y carga super bien y duradera. Las he comparado con Duracell (2500M), Sony (1900), Energizer (2100) y Eneloop (2500) sencillas y se la gana a todas ellas.

bom produto

Excellent. Charge well and keep charge for a good time when not in use