Energizer NH15BP-4 ACCU 2450mAh Rechargeable AA Batteries, 4-Count Package
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Customer Reviews of Energizer NH15BP-4 ACCU 2450mAh Rechargeable AA Batteries, 4-Count Package
Customer Review: Good way to save money
Summary: 5 Stars
I've found these to hold a charge for quite some time. I keep extras on hand, in the charger, so that when the ones being used give out I can easily swap. They do lose their charge over time though (like all rechargeables) so don't put them in your camera and expect to take many pictures a month later. For items that you use infrequently I would stick with the non-rechargeables. Customer Review: Good for a few months
Summary: 1 Stars
I specifically searched the web looking for issues with these batteries. They are great at first, but after a few months of using them, they just don't last.
I have had the same issue with 2 different batches of them. I was starting to think it was the charger, but they only happened to the Energizers, and not to the generic NiMHs with a 2200 mAH capacity, that I've had longer than these Energizers that are still going strong
Energizer's goal was apparently to get the highest mAh number, at the cost of durability. Their website even cites half the number of cycles these 2500s have over the older 1700s...but I'm not getting anywhere near the 500 they say..more like 20 (to be generous)
Customer Review: Not worth it! Self-discharge rate is too high!
Summary: 2 Stars
As many other reviewers have pointed out, these batteries have a very high self-discharge rate. This means that within a short period of time (for me about 7-10 days) they will be completely dead even if you completely charged them and never used them. The only reason I didn't give these batteries 1 star is because they do work well right out of the charger. But you pretty much have to use them within 2-3 days of charging. Wait any longer and it will already be significantly discharged. I know I didn't just get a bad batch either because I have a couple dozen of these Energizers which I purchased over the course of 2+ years. I didn't notice the discharge rate at first because I used to charge my batteries pretty frequently to make sure I always had a fresh set in whatever device I was using. But eventually I started noticing that even my "freshly charged" batteries weren't lasting very long. So I started paying closer attention to how frequently I charged my batteries and realized that even after a week they would be mostly or completely dead.
I've switched over to Rayovac Hybrids and Sanyo Eneloops which both have a much lower self-discharge. I've very happy with both of them and would definitely recommend either of them over these Energizers. I hope that Energizer eventually comes out with some low self-discharge batteries because I really like their other batteries. But avoid the rechargeables. They're just not worth it.
Customer Review: Very short lifespan, do not buy!
Summary: 1 Stars
I bought the AA Energizer rechargeables for use in a XBOX 360 controler. I bought a 4 pack, and would cycle them in and out after one set drained. For the first month or so they were great. They lasted much longer than alkaline batteries. But as the months went by, the drain cycle got shorter and shorter. Now, I'm at the point where a fully charged set of AAs, will drain themselves completely empty sitting on the shelf, in less than 1 day. They will not hold a charge. While being used, they won't last more than 2 hours now....compared to 20+ hours when new. From my experince, these batteries cost WAY too much to have such a short lifespan. I will not buy more. I'll try another brand. And the other comment made about the size is correct. These are HUGE AAs. They will get stuck in tight components. Forget about even trying them in something like a flashlight or an expensive camera. Customer Review: Very short charging cycle!
Summary: 1 Stars
I bought 3 packs of this Energizer rechargeable battery half a year ago and used 3 each time for my radio. I found the battery lifetime after each charge is gradually decreasing over time. Now is about 3-4 hours of listening time in my radio after each charge. If I use one-time non-rechargeable batteries, it lasts 30+ hours. This is a big surprise to me because I have to recharge these batteries every 3-4 days in the Energizer charger for at least 4 hours and it is very inconvenient. I would not recommend these batteries if you are looking for equivalent performance as normal non-rechargeable batteries.