Review on Tenergy AA Rechargeable NIMH Battery Pack - 2000mAh Pre-charged, Low Self Discharge, High Performance (16 PCS) by Miguel Kriglstein

Despite the Centura's advertised similarity to the Eneloop, the Centura has a significantly higher self-discharge rate. I would rate these batteries about 4.3 stars (price. 5 stars, capacity. 5, self-discharge rate. 3.) If they didn't advertise these batteries as 90% capacity for 6 months and 85% for 1 year , I would give them 5 stars as they offer good value for money on LSD. However, since they have a higher discharge rate than advertised (I'd say no better than average for LSD), I can't do that. I have replaced virtually all alkaline batteries with NiMH LSD. Most devices use AA cameras, flashlights, GPS, wireless devices, etc. and are loaded with older Rayovac and Eneloops hybrids. There are a few that use AAA and they have hybrids. When I saw the price of 4 Tenergy Centura AAA for $5 and the advertised comparison to Eneloop (generally considered the best LSD available), I couldn't resist buying one to check out and keep as a backup. As with previous reviewers, I was also impressed with the starting capacity, which was well above the 800mAh rating. After a few cycles of discharge / charge on the LaCrosse BC-9009 at a discharge current of 100 mA, they got a capacity of 916, 880, 879 and 870 mAh. Pretty impressive for AAA batteries. I originally intended to test the capacity at 6 months and 1 year to determine the rate of discharge. However, after 92 days of reading the NLee review, I decided to test myself a pair that are now 110 days old and have been stored in the basement at a temperature of 60-65 degrees. Result: 916 mAh reduced to 727 mAh. 79% of the initial capacity. 880mAh up to 731.83% of the initial capacity. Average these two numbers and you get 81%. Consistent with NLee results and already below the stated 85% in 1 year. However, there is another way to look at it. These batteries have a nominal capacity of 800 mAh. So if you count the percentage of rated capacity they are now averaging 91% in just under 4 months. While the layoff rate is likely to decrease over time given the past layoff rate, it's rather doubtful that they won't lose more than 1% over the next 2 months or retain 85% per year. Honestly I will check one battery after 6 months and the last one after 1 year. If after 1 year there is 680mAh left (85% of 800mAh), I will update this review and change the rating to 5. Can I recommend these batteries? Absolutely! They are of great value to LSD! Buy 800 mAh LSD from well-known brands and you will pay twice as much, have less capacity and see little change in discharge rate. However, if you want an LSD battery with the advertised 85% capacity for a year, it seems you need to spend extra money and get yourself an Eneloop. Six months later (184 days) I checked both remaining batteries for self-discharge rates. Results. The 879mAh battery is now 726.82% of the original and 91% of the nominal 800mAh. 870mAh is now 710.82% of original and 89% of nominal. Allow all four batteries to undergo 4 charge/discharge cycles to determine capacity loss with use. Including initial test preparation, this adds up to a total of 7 cycles. Initial capacity/current/waste percentage for 4 batteries. 916/851/7%, 880/876/less than 1%, 879/866/1.5%, 870/836/4%. Conclusion: It seems that after about 3-4 months the frequency of discharges drops to about 1% per month. While it doesn't quite match Eneloop, it's close to the advertised NOMINAL capacity of 800mAh. The two batteries (880 and 879) held capacity reasonably well in use, but the 870 showed a noticeable drop and the 916 was unacceptable. While it should be noted that all wattages are still above rating, I have little confidence that the 916 will last long. I would say that I have two 5 star batteries, 4 stars and 3 stars. My original 4 star rating still stands. Added note: Early buyers, including myself, report a starting capacity of around 900mAh, while later buyers report around 800mAh. Manufacturer. My tests confirm significant quality fluctuations within a batch. The durability of the Centura remains unknown. For those concerned about this, I would recommend Eneloop in every respect for their established high quality, especially given Revain Centura's recent 40% price increase.