18650 7.4V5400mah2 series 3 and shaped triangle-shaped explosion-proof light lithium battery-7.4V-Lamps lithium batteries-Products-Guangdong Super Battery New Energy Co., LTD
Everything You Need to Know About the 18650 Battery
Two batteries Li-ion 18650 and hammer -simulation of crushing and hitting. Explode test (lithium) - YouTube