Tenergy Centura AA Low Self-Discharge LSD NiMH Rechargeable Batteries, 3 Card 12xAA

• 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, 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

this batteries are great,they are ready to use and the charge last for a long time and when they finally run out of juice,you just have to recharge them,so, so far so good

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Fortunately, I have a La Crosse Technology Alpha Power Battery Charger, BC1000 so I am able to see the juice value in these batteries. After a couple of discharge/charge cycles I got readings of between 2100 to 2300 mAh, well above the 2000 mAh listed for these batteries. (Note that with new rechargeables you may need a couple of discharge/charge cycles before you get stable mAh readings).

So in summary (at least for the batch I got):

AA's are on average 2200 mAh which is well above the 2000 mAh listed for these batteries.

This mAh value is similar to the older and less expensive Tenergy High capacity NiMH Rechargeable battery package: 8 AA 2600 mAh + 8 AAA 1000 mAh; which are listed as 2600 mAh but average about 2000 mAh. However that is where the similarity ends. The new Tenergy Centura are still able to hold 80% of their full charge (of 2200 mAH) after a month (which if adjusted for 2000 mAH would mean they hold 90% of the the 2000 mAH). This is in marked difference compared to the older Tenergy "Blues" that fall to 80% of their charge within a week of being on the shelve. Since I general replace my batteries in about a month I am unable to test the shelve life of the Centura over a longer period but given that they are at an adjusted 90% of their full mAh at about a month, it would be a stretch to accept the manufacturer claim that they "maintains 85% residual capacity after 1 year of storage".

Overall though, I find the Tenergy Centura to be a decent rechargeable battery especially given the price. I would actually rate it a 4.5 star battery.

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Low discharge batteries are the way to go!

Don't just buy the highest mAhr you can find. They go flat way faster than most.

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While the batteries work fine in most applications, be aware that they are slightly larger than regular batteries. This means that they do not fit in some devices.

I've bought a total of 16 Tenergy AA batteries and have been very happy with them. I've measured the capacity of all of them using my LaCrosse BC-700 charger and the average is 2030 mAh, which is slightly above their rated capacity of 2000 mAh. The internal resistance is 0.10 ohms, which is the same as some Eneloops and AccuLoop AA batteries that I have. I also measured the voltage for over a month and the discharge rate is the same as the Eneloops and AccuLoops. I think these batteries are very similar to the Eneloops, but they are cheaper. Compared to the AccuLoops, they have a little less capacity, but they are much cheaper, so these Tenergy batteries are now my rechargeable battery of choice.