Bought my gloves in 2018 and bought these batteries as replacement for the original batteries that came with the gloves. I am excited to see how many hours these will last with my gloves on high this winter.

Batteries last 7 hrs. and I have used them 8 months out of the year (my feet are always cold) in my heated socks. they have lasted for more then 2 yrs. Aesome product!!

Very good company to work with !

Initially got the base layer shirt as a Christmas present for my wife. It came with 2 batteries which worked fine. However, with 4 batteries, it warms MUCH quicker and the heat lasts longer. BTW, she loves it! Fantastic response time for questions from the company as well!

I assumed it was a pair and not a single. I didn’t read far enough. I bought them for gloves and one doesn’t really help!

Was able to wear my base layer and be warm and cozy outside for 7 hrs.

Using this battery for my beanie to keep my head warmer longer.

Batteries seem to be holding up.

Give extra hours on my use!! Gets me through the whole day!

This battery works great. I purchased it because I was only getting a few hours of use from my base layer top using 2600ma batteries. It was frustrating having the comfort of the heated gear, only to lose it mid-morning. With a 5000ma rating, I was expecting to get about twice the life from these batteries, but surprisingly they're lasting 12-16 hours; makes me think there's probably something wrong with my 2600ma batteries; none the less these work surprisingly well. Of course, they are a little bulkier and heavier, but not so much to be uncomfortable. It's been a great improvement for me, and makes my gear worth the investment.

Everybody and I mean everyone should have a piece (or4) of FNDN clothing in their wardrobe! Fashionable-Functional-Fantastic Extra batteries are a nice backup snowing- shoveling- or something I don’t recommend but do- cold weather golfing!