https://alexnld.com/product/2pcs-keeppower-p1835c2-imr18350-1200mah-3-7v-10a-rechargeable-18350-li-ion-battery-with-box/?hilite="2PCS BestFire 18650 Battery 3400mAh 40A 3.7V USB Rechargeable Li-ion Battery With Protection Board"