https://alexnld.com/product/2pcs-keeppower-p1835c2-imr18350-1200mah-3-7v-10a-rechargeable-18350-li-ion-battery-with-box/?hilite="2PCS TrustFire 3.7V 900mAh 14500 Li-ion Rechargeable Battery Lithium Ion Batteries With Protected PCB for LED Flashlights"