- Very slow self discharge maintains 85% residual capacity after 1 year of storage and 70% residual capacity after 2 years of storage
- Apr. 4 time more shots than with alkaline batteries. High performance even at low temperatures down to -10 C during your winter vacation
- Designed for enhanced performance for high drain applications such as digital cameras, CD players, portable audio devices,
- Also designed enhanced performance for hand held games, 2-way radios, PDAs, and other portable high drain digital electronics
- Can be recharged for up to 1000 times, providing big saving by replacing hundreds of throw away AA batteries.
- Can be rapidly charged with any quick charger, smart chargers, plug in charger or universal chargers
Frankly, I don't have much confidence in Tenergy products. But the present low price (30% less compared to eneloop) is just too hard to resist. So here are my test results, using my old La Crosse BC-900 Battery Charger:
Right out of the package, the average remaining charge measured was only 520mAh, or 26% of the rated capacity of '2000mAh'. In comparison, Sanyo eneloop typically arrives with ~75% of rated capacity.
After the first recharge, two cells reached ~1250mAh, while the other two reached ~2100mAh. I'm surprised to see this discrepancy, because it never happened to other name-brand LSD cells I have tested.
After the second recharge, all four cells reached ~2100mAh. Subsequent charge/discharge cycles gave average capacity of 2108mAh. This is very similar to the capacity of Sanyo eneloop.
It will take a few more months before I can have any long-term self-discharge data. As of right now, the Tenergy Centura seems to perform as well as advertised at least after two full discharge/recharge cycles. So I consider Tenergy Centura to be a good low-cost alternative to Sanyo eneloop. But for mission-critical applications, I will still trust eneloop over all other brands.
[Aside]
Make sure you shop around for the best unit-price. Presently the 12xAA package is actually more expensive than three 4-pack, after you factor in shipping cost.
[Update on Sep 24, 2011]
Long term self-discharge data: After 3 months in storage, a pair of Tenergy Centurs AA cells retained 1770mAh, or 84.3% of original capacity. This number by it self looks great. But a disturbing finding is that, after two more charge/discharge cycles, the average capacity is now just 2015mAh, or 4% lower than what I measured before. I have observed this kind of capacity reduction previously in off-brand precharged cells (such as Lenmar Ready-2-Go R2GAA), but never in Sanyo eneloop cells.
[Update on Nov 27, 2011]
Tested another pair of Centura AA cells after 5 months in storage. The results are similar: They retained 81.0% of original capacity, but their new average capacity dropped by 4% to only 2030mAh.
[Update on Nov 19, 2012]
I re-tested all four Tenergy Centura AA cells again on the same BC-900. To my surprise, their capacities are back to normal between 2070 and 2110mAh. I assume my previously measured lower capacities were affected by different ambient temperaure? Anyway, I have to restore my rating to 5-star since I can find no faults with this product.
Buy Tenergy Centura AA Low Self-Discharge LSD NiMH Rechargeable Batteries, 1 Card 4xAA Now
I purchased Tenergy Centura AA Low Self-Discharge (LSD) NiMH Rechargeable Batteries, 1 Card 4xAA. These batteries are doing great for my first month using them. I use them in my Sony portable CD player to listen to books and they are much better than the Energizer Rechargeable batteries that I had been using. Plus they have held their charge longer than the Energizers. I guess the LSD[Low Self Discharge]is responsible for this. I, also, purchased the [Tenergy Centura AAA Low Self-Discharge (LSD) NiMH Rechargeable Batteries, 6 Cards 24xAAAfor my MP3 Player and use 1 battery in it (again listening to books)and 3 in my books light. They are doing better than expected. The AAA is holding it's charge very well...changing the battery every 24-26 hours of play for the MP3 player and changed it out after 6 nights in the books light (which I am using as a portable night light while staying with my daughter and new baby). I could have gotten more time out of the book light, however, the light was starting to get a little dim and I chose to change it out rather than see exactly how long it would take to wear it down completely. I am EXTREMELY satisfied with these products, especially since I read such poor reviews on the regular Tenergy batteries. The Centura has exceeded my expectations and the price made it well worth it. With that being said, I have only had these batteries for a month or so and can't comment on the long term wear of them. I can say that in this month, I have put them through their paces and the ear plugs in my ears....(two babies in the house, a 17 month old & 15 day old and when one cries the other picks up on it, so Grandma has the MP3 player or CD with books going 24 hours a day in one ear and the other ear listening to babies)I'm pleased to say the batteries haven't failed me yet!!! I hope that long term is the same.There are a lot of scientific reviews that provide a lot of data and I, too, find them valuable. However, sometimes things just come down to practical experience. I have had nothing but good luck with these batteries. These LSDs live up to their claims and will power just about anything I put them in even if they've been lying around for a few weeks.Currently I am using them in two Plot Watcher Pro game cameras. These are time lapse cameras and take a picture every few seconds as opposed to just when something walks by. These batteries have been running the cameras for weeks at a time, taking about 7,200 pictures per day. (They get assembled into an AVI for those wondering. It's very convenient.) I haven't seen the batteries go dead yet, but that's because I refresh them every few weeks whether it needs it or not. During the off-season I'll experiment to see how long they will go.
Given that they are operating for so long at temperatures of about 50 degrees during the day and 30 degrees at the night I have NO complaints about them.
I would/will gladly buy more of these.
Want Tenergy Centura AA Low Self-Discharge LSD NiMH Rechargeable Batteries, 1 Card 4xAA Discount?
Update 2012.08.17: I have only charged these batteries one time since I bought them and they are not even close to needing a recharge! I'm using them in a blood pressure monitor that gets regular use almost daily.These are the first "LSD" batteries I have bought and I have a few sets of Tenergy batteries and they've been really good and some are 3 years old with regular use and still going strong. I'll check back when I've gotten some use out of them for an update and rerating...
One thing that will absolutely make or break your batteries is the charger! I've worked in broadcasting, medical, RF, computer, and telecomm electronics for over 25 years and part of some of those jobs was to know all the battery chemical types and chargers. I'd have to say that about 95% of the chargers out there are cheap primitive junk. Do yourself a favor and invest in a really good charger so your batteries will be cared for and last instead of going bad in just a few months or a year. I'm the type that has batteries that will last as long as 10 years so I think I have it down when it comes to knowing the technology of a good charger.
A few years ago I bought 2 of these Titanium MD-3000 universal smart chargers and I couldn't be happier! Read my review at the link below. Battery Junction is another place to buy them if they dry up here on Amazon. The price is $40 and worth every cent!
http://www.amazon.com/Titanium-Universal-Ultra-Charger-MD-3000/dp/B0035H59O2/ref=sr_1_1?ie=UTF8&qid=1336767613&sr=8-1
Right after 1st full charge with titanium 16bay charger, is't 1.42V I'll update review one day I find something.
Diameter:14.25mm. Length: 50.20mm.
Diameter is little big and it was hard to put them in 10 AA battery box, push it hard then it could fit.
Here's diameter of my NiHM AA diameter
GP ReCyKo+ self dicharge 2050mA(typ)= 14.30mm. it's also big for the AAx10 battery box.
Sanyo Eneloop(HR-3UTG) 2000mA(typ) =14.15mm
DLG 1800mA=13.95mm
Toshiba TH-3J,2150mA(min) = 14.15mm
Maybe AA's standard diameter is 14.00mm?
so be careful if it fits to your device or not.
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