Top positive review
One person found this helpful
Excellent battery. Truly 2250mAh batteries.
on December 7, 2015
The battery is rated at 2250mAh. After the second charge I tested it using an Opus BT-C3100. It tested at 2175mAh. That's 96.6% of the rated capacity. Quite good after a second charge. It's typical for capacity tests to be within about 95% of the capacity rating. Each test can be off by a few percent.
Note that like the Panasonic NCR18650PF batteries, there's no way to tell by looking at the battery whether or not its actually a Panasonic battery, because there is no company name on it. It looks exactly like the green battery in the product photo. Although there's no company name on it, it says it's made in Japan and has CGR18650CG written on it. It does not list the mAh rating on it. A google search indicates that this is a true Panasonic battery.
Most quality batteries are made in Japan, as are the real Panasonic batteries these are said to be. Hopefully this is the real deal. Panasonic batteries are fantastic.
Beware of cheaper batteries. I've had the misfortune of ordering a few lesser known brand batteries from other sellers that completely lied about their battery capacities, stating up to 6 times more than the battery really has! All of the Panasonic and Foxnovo batteries I've ordered have performance that matches their specs. They have been trust-able batteries so far in my experience.
I recommend these batteries if you need a low cost battery that works well. If you need a bit longer run-time, choose a Panasonic NCR18650PF instead. It only costs a bit more and lasts about 28% longer. It's also newer. As I understand it, the CGR18650CG batteries are discontinued. Once the last bit have been sold on Amazon, they will be gone.