Acebeam X80-GT battery problems?

Hi there. I recently bought a new Acebeam X80-GT flashlight, and the light is amazing and is working great. The battery that comes with it is 4 pieces of Acebeam 18650 batteries 3100mAh capacity. I needed an extra set of batteries to this flashlight and searched some and found 4 brand new Fenix 18650 batteries (with 3500mAh capacity) from a local dealer. I charged them with an Xtar vc4 and everything seems to be good (as shown in the picture). When I click on the light from the lowes mode, it works good, and every level works expect max turbo. This light has 5 levels of normal light, and 2 levels of turbo mode. When I click on the turbo mode, it works, but when I click on the second and highest turbo mode, the flashlight turns off, and the button does not work anymore. I have the turn the tail cap some off and back for it to turn on again.

Does anyone here have a idea what the problem could be? For me, the protected 18650 batteries seem identical except for the Fenix batteries having some higher mAh(Acebeam 3100mAh vs Fenix 3500mAh) Please see the provided pictures and video that show the batteries and the flashlight with both battery types.

(Batteries and charger)

(The flashlight with Acebeam batteries)

(The flashlight with Fenix batteries)

Interesting. So the Fenix batteries are not high draining batteries? But the battery that comes with the light is also protected batteries. That is why I was so sure it should have worked with the Fenix batteries. After looking closely at battery holder, I see that it says “Must use high draining unprotected 18650 cells, or protected 18650 cells which PCB including 4 Mosfets” What on earth is 4 mosfets? (Yes, I am kind of newbie on this :()

How does one tell if a cell is a high draining battery? And PCB Mosfets? This is the Fenix batteries that I bought Fenix ARBL18 High-Capacity 18650 Battery - 3500mAh - Fenix Flashlights

Thanks for your replies Robin and the info provided. Will look into this more. I have never used unprotective cells on a flashlight that requires multiply batteries (due to the higher risk for failure/explosion/fire) but I take it they are safe to use on a quality light such as Acebeam, while also using a safe charger. But if I wanted to use protective cells, do I have to stick with Acebeam protective cells then? If I wanted another set of batteries, I have to buy another Acebeam set of batteries if going for protective cells? I have to send an email to Acebeam and ask them about it…But a question here. I can use the Fenix batteries in the Acebeam light? Every light mode seems to work except the highest one. I had flashlights before that required 4 batteries, but currently I only just have the Acebeam, and I had to shell out about 1000 Norwegian Krones for the Fenix batteries. Don’t think it would be possible to return them since they are not defected.

Hi KRJ,

This X80 and ACEBEAM batteries are normal working without issues.

Please READ carefully the User Manual and Battery Warning Card which mentioned the high power searchlights must be used the high drain battery without protection at least 10A Current or the protection battery which installed at least 4 mosfets.

Any questions, please email to sales@acebeam.com

Wish you have a lot of funs with ACEBEAM products !

Thanks and best regards,

ACEBEAM