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01 Sep.,2025

 

Help choosing battery for my Sofirn C8F

Hi everyone,

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I’m new to the game and get a bit overwhelmed by the level of technicality needed to make useful choice.
I just order from Sofirn on Aliexpress the C8F kit.It includes the lamp, a charger and a battery.
It’s a Sofirn Battery mah Rechargeable li-ion Battery 40A 3.7V.

I trust them to deliver a decent battery for their flashlight but I saw better?, bigger? battery such as :

- Samsung 48G mAh 4.8A

  • Samsung 50E mAh 9.8A
  • LG M50 mAh 7.27A
    others ?

But can’t figure out which one is suitable for the flashlight, I plan to use their charger,any input on that ?

Any help and some insight will be really appreciated.
Thanks for reading,
Vincent

I also recently purchased a C8F and wanted a spare battery. I went with the Samsung 50E. I was looking at post #36 in this thread:

All three of those batteries make good choices in my opinion but the Samsung 30T and Sofirn battery will give a little higher output current due to lower battery resistance. That’s really only a concern if wanting to use the max output for any length of time.

For me I wanted a little more capacity and will only use the max output on occasion so I don’t care if I have slightly diminished output. (I probably won’t notice the difference anyhow).

Also the charger that Sofirn provides works but I wanted something better. My choice was the Miboxer C4 Upgrade. The Miboxer C2- would fit a also.

Do we know which cell Sofirn is using in their batteries?

As far as spare cells, the Samsung 40T might be the best all-around. It will easily handle the current demands of the C8F, while having 33% more runtime than a 30T. The mAh cells might work, but they might be getting into the upper ranges of their current ratings.

I got the kit too & am pleased with the Sofirn also.

Using the Samsung 50E you’ll get a bit more run time but a little less output on Turbo.

Using the Samsung 30T you’ll get a bit less run time but a little more output on Turbo.

The Sofirn battery, as Lightbringer said…… “works just fine”. :+1:

Delta_V mentioned the Samsung 40T, I don’t have one of those; but as he said….it would be a good one. On par with the Samsung 30T, but 33% more runtime.

Hey that’s great. I think the Samsung 40T is also a good fit. If I could easily find another Sofirn mAh battery, I’d go with that too. A 50E battery should be arriving soon and will have a chance to check that out.

I ended up buying the Miboxer C4 Upgrade charger. I thought it was a good value. I posted a picture of the Sofirn in it here:
Charger for or (post #22)

Powering Performance: Choosing the Best Vape Battery for ...

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