Flat battery for EAGLETAC G25C2 flashlight?

Hi friends, I have to buy a few batteries for EAGLETAC G25C2 flaslight.
My first choice would be AW cells 3100mAh but some users thell me they are flat top and don’t work reliably in the G25C2. If you use EAGLETAC G25C2 flaslight, can you tell me if you use flat batteries like AW 3100mAh? Thanks!!!