TrustFire IMR 14500 3.7V 700mAh please. 
http://www.kaidomain.com/p/S023881.TrustFire-14500-3_7V-700mAh-Rechargeable-Li-ion-14500-Battery
https://www.fasttech.com/products/1420/10002173/1804004-trustfire-imr14500-3-7v-700mah-rechargeable-li
We’ve talked about it about 2 months ago. In the meanwhile I received them from KD. I believe they’re really good for their money.