Efest IMR 18650 LiMn 2000mAh Battery - Button Top If this is what you have, they should work.
Black label Efest IMR 18650 HD 2250mAh Battery - Button Top
Of course ProVape recommends AW, however other batteries will work. They do need to IMR or other unprotected high drain button tops though.
The links provided are for reference, you may find better deals elsewhere.