AmazonBasics AA Rechargeable Batteries (8-Pack) Pre-charged - Packaging May Vary
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Most helpful customer reviews
1513 of 1536 people found the following review helpful.
No, those are NOT rebranded first-gen Sanyo eneloop cells
By NLee the Engineer
I have previously tested the original AmazonBasics NiMH Precharged Rechargeable Batteries (in black wrappers) back in 2011. Recently I purchased a set of those new AmazonBasics NiMH Pre-Charged Rechargeable Batteries (in white wrappers), because people kept asking me: "Are those rebranded 1st-gen Sanyo eneloop batteries?" Based on my observations so far, the short answer is "NO". But wait, don't leave yet!
I measured the capacities of those AmazonBasics AAA batteries, using my La Crosse BC1000 charger. Here are my findings:
- Right out of the package, the average remaining charge is 562mAh, or 70% of the rated '800mAh' capacity.
- After one recharge/discharge cycle, the average capacity jumped to 797mAh.
- After another 2-3 more cycles, the average capacity leveled off at 821mAh
The above behavior is consistent with my previous test results for original (1000-cycle) eneloop, 2nd-gen (1500-cycle) eneloop and 3rd-gen (1800-cycle) eneloop cells. Note that just as in this case with AmazonBasics cells, all eneloop cells are charged to around 70% when they left factory.
Based on electrical characteristics, I believe that those white AmazonBasics cells are indeed rebranded Sanyo eneloop cells. But it is impossible to tell whether they are in fact 1st- or 2nd-generation eneloop. This is because to the end-user, there are no measureable performance differences between 1st, 2nd or even 3rd-generation eneloop cells beside their cycle life claims.
Because of the '1000-cycle' claim, most people would jump to the conclusion that white AmazonBasics cells are equivalent to 1st-gen Sanyo eneloop. My closer examination, however, suggested that they are more likely to be rebranded SECOND-generation eneloop instead.
Please refer to the picture I uploaded to 'Customer Images' section. Look closely at the positive terminals of those three types of batteries, and you'll notice the difference in their so-called 'vent holes' (the name is misleading because those openings are not actually used for venting):
In the case of AAA cells:
- First-gen eneloop AAA cell has triangular-shaped vent holes
- Second-gen eneloop AAA has vent holes with rounded tops
- White AmazonBasics AAA has vent holes with rounded tops
In the case of AA cells:
- First-gen eneloop AA cell has triangular-shaped vent holes
- Second-gen eneloop AA has no vent holes
- White AmazonBasics AA has no vent holes
Therefore based on their mechanical aspects, I have to say those white AmazonBasics cells are most likely rebranded 2nd-gen Sanyo eneloop cells.
Why would Amazon intentionally sell rebranded 1500-cycle eneloop cells as just 1000-cycle? The answer is Price Differentiation. Manufacturers often de-spec a product when it is sold under different brand at a lower price. Otherwise it will erode the market for their higher-priced brand.
What if I'm wrong and those AmazonBasics cells are 'only' 1000 cycles? Well, you could find out the difference in... TEN years. So for now, just pick whichever brand is on sale and be happy.
0 of 0 people found the following review helpful.
... (so far) I have found them to be very good quality. They are made from good materials
By Art W.
One thing that I appreciate about Amazon products is that (so far) I have found them to be very good quality. They are made from good materials, and do exactly as promised. These batteries are no exception. I use AA batteries in a couple of my headlamps and buying them again and again can get expensive. . . so I am always looking for a good pair of rechargeable batteries. One thing that attracted me to this set is the promise that they will continue to work well even in the cold which is something that some of the batteries that I've used this last winter have struggled with.
So far I've seen that these batteries last for a good while (length will totally depend on what you use them for), keep my headlights bright and in my opinion are almost as good as alkaline batteries for their first use . . but much better in that you can use them again and again.
I can't speak to them holding their charge for years. . . since I haven't had them that long. But I have any problems later down the road or discover anything else about them that's awesome I'll try to remember to come back and update this review.
0 of 0 people found the following review helpful.
Affordable reusable power for the household.
Affordable rechargeable batteries. So far they have functioned in all the devices I've put them in and have been recharged about 6 times now mostly powering xbox controllers. Would recommend to anyone looking for affordable rechargeables to use around their house to cut down on battery waste and cost.