Sofirn c8f battery query

[T4ten]

Hi. I have just received this torch from the sofirn store which was advertised as having a 21700 4000mah 3.7v 40a battery included. It actually came with a 21700 5000mah 3.6v 18wh battery. Despite trying to research the difference I am very confused.

Can anyone please explain the difference and what difference this will make to using the torch? Brighter? Duller? Runtime? Many thanks in advance.

 

[Dave D]

Li-ion batteries are listed as 3.6v (they can be charged up to 4.2v), I think the 3.7 listing was probably a typo, you've received a 5000mAh battery instead of the 4000mAh one that was advertised.

You have ended up with a better battery because it has 25% more capacity (runtime) than the 4000 version.

 

[T4ten]

Thanks for the prompt reply Dave D. What is the significance of one being marked 40a and the other 18wh? Many thanks.

 

[Dave D]

The 18wh is the nominal power, similar 4000mAh versions are rated at 14.78wh so you have a better battery.