2PCS 18650 Rechargeable Battery 3.7 Volt Lithium 9900mAh Large Capacity Flat Top for Flashlights Headlamps

Same number as the batter in my product but found out the battery in my product is proprietary.

Manufacturer purposely added an extra 9 in the capacity to trick you into buying this garbage battery. Capacity is more like 900 mah rather than 9900. I fully charged this battery and then tested it on a short led strip. Did not even last a half hour powering the strip. Did it a couple of times and same results. Don't even waste time on this battery. If only I can give this 0 stars.

I was skeptical about this battery since it claims to have a 9800 mAh capacity. However, it has worked exceptionally well for my Meshtastic radio. The pair of batteries has been exposed to inclement summer weather for a couple of months and continues to function flawlessly. In terms of current delivery, I don’t believe it fully lives up to its advertised capacity, but it certainly performs just as well as my other 3500 mAh batteries. I have it set up to charge using my solar panel, and I haven’t encountered any issues with charging.

They're doing the job at a much better price. The charge isn't holding as long as the more expensive batteries, but I can live with that.

Long lasting with a full charge

Excellent product. still using them today

These hold a horrible charge. I've set up a return.

Why did you pick this product vs others?:I thought it was a good product when I read about it. I used it in my flashlight for five minutes and charged it back and a couple days later the flashlight had no power in the battery had drained so I threw it out and stuck the second one in there and it’s been good. So I basically got half of what I paid for.