I found a charger for my laptop for $5 at a thrift store. So I took the money I saved and walked across the street and dropped $ 27.99 on 4 AA 2700 miliamp hour batteries I’m not going to test them since I’m on tour. My previous purchase was Duracell 2600 milliamp hour which I use in a flashlight which is also my headlight. 3 of the Duracells charge in the same amount of time and one other takes a half an hour longer at 600 milliamps. The X2 Power is even worse. 3 take the same amount of time and 1 takes an hour longer. This is annoying but I can live with it. The X2 power are very well made and are about .5 mm thinner than the Duracells. Some rechargeable batteries will jam in a flashlight a light since they have a larger diameter. It is up to you to decide if they are worth the expense. I will probably pick up 4 energizer 2450 milliamp hour when I find them. What the industry ought to do is get rid of the glued on label and use a more durable heat shrink label. This will also all a bit power. I will pay $ 27.99 for those r
That seems really expensive. But Batteries+ seems on the expensive side anyway.
Why did you decide on those? I never had heard of the brand before. I can’t find and independent testing reports. I imagine they are a rebranded Chinese cell. X2 Power seems to be better know for Li-Ion 12 volt stuff. As far as I can tell.
Are they supposed to be low self discharge (LSD) cells?
BTW, I found this: https://www.amazon.com/HiQuick-Pre-Charged-Rechargeable-Batteries-Charging/dp/B08LMJ2Q3K
EDIT: This is NOT a recommendation. They just came up when searching for 2700mah NiMh AA cells.
I did see some limited testing on them. They are LSD. Tested around 2700 mah. Even has an 8 bay charger.
I pretty much stay with Eneloops. The standard ~2000 mah ones. 1000 cycles, test right at rating. Something like 80% after 2 or three tears (??). I have some that are close to 8 years old and they still are good.
Though they used to have good (Japanese) NIMH cells at Amazon. I think they too have gone to a Chinese maker.
I have had decent reults with these:
They are ~$10 for 4. I have seen them on sale for $7. Last I read, they are still Japanese cells.
Usually you give up something for the higher capacity. Either self discharge rate, cycles, or both.
BTW, if you change bays in the charger does the same cell always take longer to charge? You may have a bay in the charger that is not right. Or maybe one cell out of each batch of 4 that has less capacity.
What charger are you using?
sorry to tell you but energizer and duracell nimh AA are garbage, at one point energizer rewrapped eneloops, those were 2000mah, those were good but everything else nimh they cell is trash, i tried most of them if not all, waste of money.
2700mah lsd are no different than 6800mah 18650,
Get ikea Ladda cells, those are real quality cells, you can’t get those cheaper than that
+1, so much capacity on an NiMH does smell really fishy. I mean, same chemistry and size but that much extra capacity? Not a believer in magic…
I’ll be sticking with Eneloops and Laddas until someone reliable does a real in-depth test on them and publishes the results.
Even top NiMh Eneloop clearly states that their high capacity cells (2550) do not have the cycle life of the standard capacity (2000). This is a trade off for more capacity.
ALL the REALLY high capacity (2700-2800, higher are pretty much all bad) cells I’ve gotten have been a disappointment ultimately. They (some anyway) look good at first but the internal resistance goes up rapidly, capacity goes down, and charging termination starts to become more erratic. In a couple years they can’t keep up with a much older standard Eneloop.
Since there are so many variables to regular use, you may not see this if you don’t do capacity and IR testing. OTOH, if you don’t know, are satisfied, then be happy.
My flashlight headlight runs for 7 hours on 4 batteries. I do cross country trips and some times ride all night long. Also it may be a while before I find electricity. So I wanted high capacity batteries. I plan on picking up another 4 cell light perhaps a BAMFF 4.0 XL It was an impulse buy and I thought you would appreciate the information.
I am sure that everyone is just trying to be helpful. I know I was. With more information you can make a more informed decision next time you buy. I didn’t detect anyone trying to belittle you for your buying choice…
I mean, we don’t know what we don’t know… 
I do appreciate your OP. I had no idea that anyone was selling AA NiMH cells rated at 2700 mah. Now I do. Though I think I would much rather have two sets of the Ladda or Eneloop cells to depend on than one set of the sort of no name cells that are rated that high.
BTW, you did not mention what charger you use… nor if it is a particular cell that takes longer to charge… or if it is any cell in one particular bay of your charger.
In a 4 cell light, you will be limited by your worst cell… The ones that are taking much longer to charge are almost certainly weak.
One last thing, I am curious, what headlamp are you using? I was trying to think of something that uses 4 AA cells…
Was this part really necessary?
BTW, I totally agree with the part about the Eveready and Duracell cells!
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I had one of those! Certainly not nearly as nice as the OP’s, it was a PoS bought at a dollar store for the wife because we needed a headlamp fast and it was all that was available. It has since been replaced, and served as proof that the wife really loves me as I wasn’t doghoused even for a single night 
It might even still be around, if you’re curious I can try and dig it up for some pictures – but it isn’t either nice nor pretty… 
x4 AA 2000mAh NiMh AA cells have about same amount off energy like one 18650 3500mAh…
Both Home Depot and Lowes sold 4AA lights at around 500 to 600 lumens with a 1/4 mile throw. Both had double O rings and a plastic carrier. Both carriers would handle the fattest batteries. I wish they would bring these back.
Not a headlight a regular flashlight. The charger is a digipower DC U450 which charges AA and camera batteries and has a USB output. I
Couldn’t find much on that charger. Like charge rate or if it has independent charge bays. Just thinking about why some of your cells are taking longer to top off…
I guess they don’t sell it anymore…
The “manual” doesn’t even have a real specifications section.
Though I like the way it allows one to charge most camera batteries. Ingenious design with the sliding contacts and clamp system.
I got the charger at WalMart and recently picked up another at a BigLots type store. It will charge 1 or 2 AA AAA NiMh or 14500 or 3.7 or 7.4 volt camera battery. The charge rate is always 600 milliamp.