AmazonBasics AA High-Capacity Rechargeable Batteries (4-Pack) Pre-charged - Packaging May Vary
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- Pack of 4 AA high-capacity rechargeable batteries
- Maintains 65% of original charge after being stored for 3 years
- High Capacity: 2400mAh (milliamp-hour)
- Pre-Charged using Solar Energy
- Made in Japan
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From the manufacturer
AmazonBasics AA High-Capacity Rechargeable Batteries
Want high-capacity rechargeable batteries that actually last? AmazonBasics High-Capacity Ni-MH Pre-Charged Rechargeable Batteries provide the extra power you need. Whether for professional or everyday use, a longer runtime is just one perk of these high-quality, reliable batteries.
Ready When They Arrive
AmazonBasics High-Capacity Ni-MH Pre-Charged Rechargeable Batteries come ready to go out of the box. Put them in your device and go.
Built For The Cold
When you need batteries that perform well even in cold temperatures, these batteries maintain high power in low temps. They’re great for ski resorts and winter activities.
- Charge hundreds of times with minimal power or capacity loss
- Stay 80% charged even after a full year of non-use and are still fully rechargeable after 3 years
- Ready to use out of the box
AmazonBasics brings you everyday items at a great value
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I measured a set of those AmazonBasics 'high-capacity' AA batteries, using my La Crosse BC1000 Battery Charger/Analyzer. Here are my findings:
- Right out of the box, the average remaining charge was 1204mAh, or 48% of the rated 2500mAh capacity. Date code on them says '2014-02', but just like other eneloop batteries, they were not fully charged when then left factory.
- After just one recharge/discharge cycle, the average capacity jumped to 2547mAh.
- After another two more recharge/discharge cycles, the average capacity settled at 2555mAh. The spread is very tight between 2510 and 2610mAh, which indicates good quality control.
The above behavior is nearly identical to that of the Sanyo XX cell, which I have previously tested in 2011.
Mechanically, the AmazonBasics high-capacity cells appear identical to the Sanyo XX. Refer to the photo I uploaded to the 'Customer Images' section, and you will see that they have exactly the same shape for positive terminals, same texture on their wrappers, even down to the same 'vent hole' design.
I should note that the Duracell 'Ion Core' AA Rechargeable Batteries also have identical electrical and mechanical characteristic as the Sanyo XX and AmazonBasics High-Capacity batteries. The Duracell batteries are marketed as just 2400mAh, even though they were tested to be over 2500mAh in capacity. I believe this is done for price differentiation purpose.
As of this writing, you can get an 8-pack of Amazon High-Capacity AA batteries for less cost than a 4-pack of eneloop XX batteries. So obviously the AmazonBasics version is a great bargain. My advice is to grab them - before Amazon gets greedy and jacks up the price.
One important note:
The AmazonBasic High-Capacity AA (or Sanyo XX, or Duracell Ion Core) is fatter than a normal-capacity NiMH AA cell, which itself is fatter than a typical alkaline AA cell. So it may not fit if your appliance has extremely tight battery compartment.
[Update on Dec 10, 2014]
Long-term self-discharge data: Tested one pair of AmazonBasics AA high-capacity batteries after 5 months in storage. The average remaining charge is 2175mAh, or 85% of the original capacity. This is even better than my previous 5-month test result for Sanyo XX batteries which showed 2040mAh, or 78% of original capacity.
The min mAh rating printed on the batteries for the Amazon Basics H.C.and Eneloop (first gen) is 800 and 750, respectively. I have no 'in the field' performance review since I just purchased these batteries. However, I have been using Eneloops for two and a half years and they are performing great. I have high hopes for AmazonBasics AAA H.C. batteries. I came here to answer some questions I had had before making this purchase....and hopefully this helped.
It as my first amazon branded battery .
We use rechargeable in high capacity for most everything in the household and pro use .
I have an excellent smart charger that is crucial in keeping rechargeables life .
I used them recently to replace aging 2400mah batteries in our Nikon SB800 flashes we use in the studio . These batteries have performed well the past few months . I always charge them with an intelligent charger and refresh every few sessions .
So far so good . Let’s see if they last a year or two .
Ordered enough to keep some in use and on standby, that way we will always have batteries ready to go.
Straight out of the box and after running the "Test Mode" once on my La Crosse charger, all 8 batteries exceeded the listed specification of:
Capacity: 850mAh (milliamp-hour), minimum 800mAh
1: 896 mAh
I will use these batteries regularly in LED flashlights and headlamps for the next few months and run a refresh cycle before doing another test of the capacity. I will update this review with the additional data.
As other reviewers have mentioned these are most likely re-badged batteries from the same factory as the eneloops at a sizable discount.