- I Just watched some Chinese batteries go bang.
A bloke at work bought a Chinese torch and batteries. charging them near at work yesterday one went bang and set on fire. It filled the room full of smoke, set fire to his nearby rucksack and melted part of the charger.Posted 5 years ago
After seeing this he was going to chuck the torch, charger and batteries but decided to blow the other batteries up first. So he loaded the spare batteries moved anything flammable, turned on and retreat to safety.
These too went bang after about 2 minutes with a shower of sparks and set on fire.
There is no way after seeing it first hand that i will buy Chinese batteries. Not even to charge in a tin in the shed.
I was getting tempted by a cheap light from eBay too.wwaswasSubscriber
explanation on the youtube page PP;
Overload of an siemens handy liion battery. It took 10min with 1A, 5min with 2A and 4:30 with 5A to finish the experiment.
not really a dig at Lion batteries from me but there’s an awful lot of energy stored in them and I do worry more about the cheap chargers than the cheap batteries tbh.Posted 5 years agoandysredminiMember
No point to my post really. Just chatting.Posted 5 years ago
Up until i saw this happen i was getting tempted to try one of the £17.99 ones from eBay and charge them in a tin in the shed. after seeing the violence they exploded with i have reconsidered.
Obviously there are different quality batteries and I have no idea what these ones were but just because the ones you say are OK now doesn’t mean that wont change. He was lucky to be on site in a concrete room with not much to burn. He normally charges them on a wooden desk in his office (he didn’t know they were prone to spontaneous combustion before this).
I have come to the conclusion that I would rather spend £200 on a second light than have my shed set on fire with all my bikes/tools and stuff in.NorthwindSubscriber
Does sound more like charger than battery tbh.
There’s quite a lot of variation in the charger quality out there… My torches get charged with an old nokia wallwart, but the original one that came with the ($3) charger rattled. Not very encouraging.
But the charger that came with my £70 MJ-872 seems very nice, UK-plugged, etc. No complaints there.Posted 5 years agothisisnotaspoonMember
My missus bought a laptop charger and battery off ebay, it scares me how poor quality it is!
The male connector doesnt sit properly in the femal battery port.
The transformer/regulartor bit weigh’s almost nothing (compared to most laptops where it’s an absolute brick).
Compared to that I’ve no issues with magicshine bits, they look as well made as anything I’ve seen from anywhere else.Posted 5 years agoneilc1881Subscriber
Yup, took my exposure apart the other week as it had let in another load of water (went back for water damaged ECB a year or so ago). The battery was remarkably similar to that of my £24 Chinese Cree jobbies… Same output from charger too 8.4V 1000mA. Will be ordering one of those fireproof charging bags pronto!Posted 5 years ago
explanation on the youtube page PP;
can only see the vid on my phone (Youtube banned at work) and didn’t see that bit, sorry 🙂
So I was right. 5 amps was too high! 😉
,i used to race rc cars and blew plenty of top notch racing cells lipo’s are pretty unstable things .
I still do!
Nobody is blowing cells up any more.
You can get a decent charger that will charge just about anything (Pb, NiMh, LiPo, LiFe, the lot, all balanced charged if necessary too) at any voltage or ampage, and be able to store cell info, charge for storage, and discharge if necessary from someone like Hobbyking for under £20 these days.Posted 5 years ago
The displays on them and the bleeps they make are IDENTICAL to £60 plus charges with a brand name on them, and they are quite ofen in the same (metal bodied) case too…..
When I need a new MTB light battery, I’ll just get a LiPo from Hobbyking: They in tough plasic cases, they have good quality wire. Perfect. 🙂
If anyone wants a good charger:
I’ve got one of these
It’ll charge a 4000mah 7.4v pack in under an hour, properly monitored.
There’s several universal charge leads for it. I got this one:
The red connector with the gold terminals is a Deans connector which can be bought for much cheapness on eBay and soldered onto your lights and battery
Pick an appropriate cell from here
And that’s what I’ll be doing when I need new light batteries. Top quality LiPo cells, I’ve already got the charger, 10 mins soldering, job done. 🙂Posted 5 years agoMr AgreeableSubscriber
I bought a cheap replacement battery for my laptop and initially it seemed great.
However after 6 months they’d lost most of their capacity.
The way you treat LiPo batteries has a big effect on their longevity apparently. Advice is keep them cool and charge them frequently rather than running them flat.Posted 5 years ago
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