Bike Light Battery fire hazard

[arendoog]

What brand?

Looks more  like NiMH battery than a lipo .Any battery can do that if left to long on the charger or charged with the wrong charger .If the pack got damaged ,like with a fall or bike crash the batteries can easily be damaged and you will only notice it when the voltage is unstable or it does not charge properly 

[jimmycool]

Nah, those are 18650 Li-ion cells in a 4 pack 8,4v bike light.

I was just curious as to who it was sold by.

[Skylark]

Like JXV says NEVER use water, I got thrown out of chemistry class in school for messing around with lithium and water, and having deliberately detonated a couple of Li-Po batteries I can attest that it is not a situation to take lightly. Sand or anything else that will smother the fire and exclude the oxygen is your best bet.

 

I know someone who lost his entire house + 2 cars because of a battery fire - he literally got out with his wallet and phone..

 

@Barend, I fully agree, the alarm and gate batteries are always on charge but those are much, much less volatile lead acid batteries - still can cause a fire yes but a lot "tamer" than Li-Po. I have been driving a car where the alternator failed and fried the battery and electrics, luckily I knew the warning signs - a strong smell of sulpher. The thing with lead acid batteries is that generally the wires connecting to the battery will get hot and cause the fire, not the actual battery exploding.

 

Remember that Lithium if exposed to oxygen it will self ignite quite violently - now you add water into the mix which as we know has oxygen as well....now in a battery the Lithium and polymer stores extra energy and bring that to the mix...well just search Li-Po fire on YouTube...

These are all Li-ion cells, lipo is used in remote control model planes/cars etc and some newer cellphones/laptops. 18650 cells are one of the safest lithium battery technologies around and world's apart from lipo which are bona fide mini detonation devices especially when they are charged outside of the device like a aircraft model planes battery etc.

Most 18650 cells are manufactured by Samsung.... #Justsayingyouwerecorrect...

Samsung makes a lot of cells but not even close to most of them, Panasonic/Ncr/Sony etc make shedloads of 18650 cells, over a billion cells are made each yr apparently.

[Bobbo_SA]

These are all Li-ion cells, lipo is used in remote control model planes/cars etc and some newer cellphones/laptops. 18650 cells are one of the safest lithium battery technologies around and world's apart from lipo which are bona fide mini detonation devices especially when they are charged outside of the device like a aircraft model planes battery etc.

Samsung makes a lot of cells but not even close to most of them, Panasonic/Ncr/Sony etc make shedloads of 18650 cells, over a billion cells are made each yr apparently.

 

Ok fine, so Panasonic merged with Sanyo.