3.7V 16340 Battery 2800mAh 16340 Rechargeable Battery 3.7 Volt Rechargeable 16340 Li-ion Battery for Flashlight (4 Pack, Green)

These are far better than the ones that came with my burning laser. Its performance is now much higher and longer lasting.

Well made and were already charged!

I purchased quantity 4 of the alleged 2800 mAh 16340 lithium-Ion batteries. They actually have a tested capacity of about 300 mAh. I had to give them the minimum rating of one star, but I feel that they aren’t even worth that.I was suspicious of them, as reputable battery stores don’t offer 16340 Li-Ion batteries over about 900 mAh capacity. So, I ran a battery test on them to determine the real capacity. The battery test consisted of three steps:1. Charge the battery to full charge.2. Fully discharge the battery.3. Charge the battery to full charge while measuring the charge current.As can be seen in the photo, the battery tester indicated that each battery had a measured capacity of about 300 mAh. I repeated the test 3 times, and received similar results each time.To verify my battery tester, I tested a brand new 680 mAh RCR123A Li-Ion battery purchased from a reputable battery store. As can be seen in the photo, the test indicated a capacity of about 750 mAh, which is better than what the battery manufacturer claims.I will be contacting the seller to obtain a refund for the mislabeled batteries.

Batteries function, and recharge well I have yet to evaluate their lifespan.

Good rechargeable batterys.Fair price.Fast delivery

Fits as replacement but doesn’t seem to hold a good charge. Get what you pay for I suppose. For aLED flashlight

Good battery life

The batteries fit my Fenix 500 Lumen Headlamp. All four batteries worked and was re-charged to 100%. The original rechargeable battery that was in my Fenix headlamp lasted for at least five years before it would not hold a charge anymore. Only time will tell if these batteries perform as well as the original battery.