18650 Rechargeable Battery Charger Set, 3.7V Button Top Lithium ion Rechargeable Battery for Flashlight Headlamp (4Batteries+ Rechargeable Charger Set)

The product is as advertised. No issues. The batteries charge, fit, and work well. No complaints and worth the purchase. Definitely a better bang for you buck than others. Would recommend.

Haven't used the charger yet... I might in the future. Bought these after purchasing a new head lamp at menards that uses 2 swappable 18650 button tops. I used a battery tester that fully charges the battery then discharges them at a selected rate (i used 1000mah) and then fully charges them again. I performed the test twice. The ones that came with headlamp were rated at 1200mah and tested at 1150ish each... these being rated at 3400 tested at approx 2900mah each. I wasn't surprised and am happy with it. Giving me much longer use time obviously. I like the battery holder... it's very convenient and seems solid. I can now keep my 1000lm headlamp running all work day. Hope this helps.

Powerful and easy to use

This was my first purchase of this style battery. I am impressed with the battery quality and the charger. Great value for this package.

I am very impressed with the batteries and charger. The batteries have way more power than the ones I replaced. The charger works very well and is built sturdy so I don't think I will be needing to buy another one anytime soon. Solid product.

Who knows if these are as-rated? The charger is kind of messed up, and the light stays red even when the batteries are charged. After being on the charger for hours one side was still red and the other was sort of green and kept going back to red, I put them on another charger and they were charged, so I know it worked, but I don't know if it had kicked off or if it would have cooked the battery if I had not removed them. The batteries did come in a nice case and seem to work well in a couple of flashlights, so I will conditionally recommend them.

Got these to use with my headlamp and flashlight. Can charge them in the headlamp and flashlight. And still have 2 backups batteries when needed

Bought these to use with my Sofirn D25S headlamps. Works great and charge fine in headlamp or included charger. I didn't time recharging but had all 4 - 18650s charged in one night. Will update review with more use.