Sony SE US21700VTC6A 4,000 mAh Li-Ion Rechargeable Battery

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This is a model of the newer case size 21700 (21mm dia x 700mm long) Sony (Murata) rechargeable battery that is being used in large battery packs for electric cars and electric motorcycles.**WARNING** : These batteries have NO OVERCURRENT PROTECTION and can discharge over 15 Amps of current causing excessive internal overheating and possibly igniting or exploding. Be sure to design in or use a circuit that limits the current (e.g. fuse or circuit breaker) FOR EACH BATTERY to prevent such an occurrence !!https://www.greentechmedia.com/articles/read/lg-chem-battery-cell-mcmicken-arizona-fire**WARNING** : Avoid Ultrafire, Ultralife, Surefire, Trustfire and other Chinese (country of origin) made 18650s as they are *notoriously* known as FAKE ratings and inconsistent capacities !! These are the ones that are typically sold on ebay, amazon, and allibaba. Buyer beware !!https://www.youtube.com/watch?v=xNGhWZRPqjUhttps://www.youtube.com/watch?v=qMZuHMlRw_0https://www.youtube.com/watch?t=65&v=eOshOXcSkDAhttps://www.youtube.com/watch?v=j4RfYufeFhc