I been building my own electric longboard for a while now . I lost my job due to it closing down so haven’t had the money to buy batteries but I had multiple laptops around as I used to repair laptops so I took out the batteries and used them to make a 12s battery. what I didn’t realize is that I muddled them up with fake 18650 batteries and 2 ended up in my pack which inevitably blew up . I was was riding for around 5 mins and I heard a weird hissing noise and lost power, looked down and a lot of smoke was firing from the side of my board. I knew exactly what it was so I jumped off and flipped over the board and disconnected the vesc from the battery pack . I then preceded to remove the battery which thankfully was only velcro’d to the deck BUT as I did that the negative terminal of the battery fired off with a loud bang hitting my foot . Lucky I managed to get the battery off my deck and threw it into the road incase it exploded or set on fire (I was testing in a blocked off road). What I took away from this experience is to just wait and buy batteries IMG_20180615_165037|281x500
The black on my shoe is what came out of the battery as the negative terminal fired off .