14500 Rechargeable Battery 2500mAh Battery 4 Pack Large Capacity 3.7Volt Li-ion Batteries for Flashlights Headlamps

I bought this for a flashlight that I was powering with a standard AA battery although the light was rated for the higher voltage provided by these batteries. The difference in the performance of the light was incredible. I bought the batteries and charger for economical reasons and both performed well. The batteries don't last long on a charge but as i only need one at a time and I have 2 freshly charged at all times it worked out well for my situation.

This replaces the battery in my Oral-B iO toothbrush. The original battery weighs 18 g, has a capacity of 800 mah, and is dead after three years. These four batteries weigh 14.6, 14.7, 15.8, and 16.4 g. The inconsistency is incredible. Are they handmade? One charge lasts about a week, a little shorter than the original. They are definitely not 2500 mah each, but maybe all four batteries together are.

I purchased this set specifically for a preferred flashlight. It gets used quite often and having fully charged batteries on hand means uninterrupted use. I have another set for other devices and it continues to serve me well. This set is economical and versatile. The batteries fit perfectly and provide sufficient power for a brighter beam.

Works great!

In testing these batteries in real life application, They produce the Voltage of 3.7. However, Based on the time to charge with a 1 Watt Solar panel and looking at discharge, these are not 2500mAh capacity batteries. Again, they work. But, not the capacity that I was expecting.

Good 3.7V lithium batteries.

Did not come with the cable to the charger ,

They are the same size.They get a little warmer in my flashlight, but it takes 4 AA's.So instead of 6 volts I am putting 14.8 into it.To bad someone doesn't come out with a filler battery.Definitely worth the money.