TenergySolla Rechargeable NiMH AA Battery, 1000mAh Solar Batteries for Solar Garden Lights, Anti-Leak, Outdoor Durability, 5+ Years Performance, 12 Pack, UL Certified

They are great and well priced, thank you.

Durability is good and the price was great. Easy to open and install

These batteries are 0.563 inches (14.3 mm) in diameter (width) as measured on a single battery (did not measure multiple batteries; I presume they are all nearly the same). The resistance right out of the box varies from 39 to 89 milliohms and we’re most commonly in the mid to high 40s. This is a little disappointing as I have other NiMh batteries that measure in the low 20s that are a couple years old (a Rayovac AA). Comparing a lower resistance battery to this in a single AA beard shaver, there is audibly less speed from the beard shaver, but it works just fine. If the resistance was in the mid to high 20s, I think this product would earn 5 stars. It will take many years to see if the longevity (advertised as 5+ yrs) holds up and the resistance stays low-ish (I think under 300 is a reasonable expectation).Update: Using an Xtar VC8 charger (see pic) I saw over 1k mAh on 4 randomly selected batteries from the 24 pack. 👍Update: Note that the negative terminal of the battery is slightly recessed. Said another way, the yellow wrapper covers the outside edge of the negative terminal ever so slightly. For an application like the Energizer PMHT61 flashlight (which I bought at Home Depot), this causes the negative terminal of the battery to sometimes loose contact with the flat conductor in the flashlight, resulting in the flashlight constantly flickering on and off as it moves. This is not a problem with other batteries where the negative therminal is slightly raised. See the included picture compared to a Rayovac alkaline.Update: March 9, 2023Having used these batteries now for over a month and cycled them less than a dozen times, my charger is measuring ~100+ milliohms of internal resistance on average. My primary application for these batteries has been in flashlights. They work, but the flashlight is noticeably dimmer after just 30 minutes (give or take), well before the batteries are drained. I’m assuming this is due to the high internal resistance characteristic of these batteries as I’m able to use the flashlight for hours at the dimmer brightness. For this reason I would not purchase these batteries again unless I knew I only intended to use them for their advertised purpose, in outdoor solar lights.Update: May 28, 2023Unable to find internal resistance specs (or any specs) for these batteries. Disappointing. For comparison, see Energizer’s specs here,https://data.energizer.com/pdfs/nh15-2300.pdf

Works great

Best solar batteries.

Rechargeable battery, not very strong

I read reviews that claimed that by changing the batteries for rechargeable solar lights, the lights were much brighter at night. Well, that is absolutely true! I mounted solar motion lights about three years ago and began to notice that they just weren't as bright when they came on during the night. So I bought these and replaced the installed, 3 yr old batteries .......and now I have very bright lights again! Simple and inexpensive solution - get them, don't be lazy!

Great choice