UNROEVS 2 Packs 18500 Rechargeable Battery with Button Top,3.7V 2000mAh INR 18500 High Capacity Li-ion Battery for Flashlights,Solar Garden Lights. (2, Button Top)

Packaging on these batteries was incredible, I kept the case for an accessory bag even after using the batteries. Arrived not-charged, but took a charge and have been working perfectly ever since install

Replaced some cheap Chinese solar lantern batteries with these and now they don't die in the middle of my camping trip anymore

Extremely good deal top quality batteries INCLUDED was a top quality case ( I wasn’t expecting it) doesn’t mention it in the description. I’m really happy about this purchase:

Great battery

I HAVE BEEN CHARGING THESE BATTERIES FOR 3 DAYS. THEY ARE STILL NOT CHARGING.

I ordered this 2-pack 18500 for use in my flashlights.This is a very rare form factor.Very few flashlights were made for 18500.I have an Olight which can take either two 18650 or two 18500.Since this is a flat-top, I thought I would need a small magnet to make the positive terminal connect with the negative terminal of the other battery for 2S (2 in series) configuration.Apparently, the flat top battery is semi protruding so there is no need for a magnet.I tested it on the Olight and it performs well.Before year 2020, all 18500 battery only had 1000mAh capacity.See my MXJO brand 18500 from back then, compared to UNROEVS side by side.So I had to test the capacity.It turned out that not only that they met the rated capacity, but also exceeded it.Speaking about solar garden light and solar outdoor light, I also have many of them.The ones I have all use 3.2V LFP/LiFePO4 either a single battery per light, or in a large capacity battery pack.There is a reason why the use of the 3.7V lithium-ion battery in outdoor lights are very uncommon.Exposed to rain and hot sunlight, there is a higher risk of fire with 3.7V li-ion batteries.I would not recommend using the 3.7V li-ion battery for the solar lights.They have the 3.2V LFP18500 batteries, perfect for those purposes.The LFP 3.2V version is safer for outdoor use.

Unfortunately we thought these were AA batteries when we ordered them, so I’m not sure we will have use for them. As it is, we don’t have the appropriate charger so I can’t speak to how well they charge (or work), however they came nicely packaged and with a nice, zip-up storage bag, and arrived quickly.

The batteries are good out of the box. Only time will tell how many recharges they will take, but for now, they are as advertised. The ad does a good job comparing other similar-sized Li-ion batteries. If you are unsure, study the images in the ad carefully. These are NOT the more popular 18650 size, which are longer than these 18500s. Overall, these work nicely as replacements for my outdoor solar lights.