I asked the seller if they were true 2600mAh, reply is below:
“Hello,OK and hope to hear your purchase soon
as I have all the certificate from nitecore for the lab test …etc
and the battery is using SAMSUNG cells and it has 4protection for the battery PCB
hope you can buy it and test it and tell your customers to buy this product
as I know Fenix have 18650 battery and only for 3protection PCB
and also this battery have buy insurrance for worldwide
hope to hear you soon
Many thanks for your help”
A good battery is not only the cell, but would need a good PCB. Most of the Chineese no-name batteries (even Ultrafire) use B-Grade, or even used Cells and the PCB is really teribble.
I would concern a battery as a tank of energy. For example the NCR18650A has 3.1A = around 11Wh.
You can multiply it with at least 500 charging cycles = 5500 Wh
If this battery costs around 15 USD = 0,003 USD / Wh
Now we would take an Ultrafire 3000 mAh = around 5 USD
Real capacity will be assumed with 2000 mAh and an average cycle life of 150 cycles = 1080 Wh
5 USD / 1080 Wh = 0,005 USD / Wh
Many people forget this matter of Life cycle, when they purchase a battery.
You can see which battery is finally more expansive….
To the Nitecore 2600 mAh and to all other un-known batteries…I would never buy something from someone, who does not have at least some idea about the product he would like to sell… H)