I'm rather surprised I have not found a thread about this in the hoop community. I thought I'd warn hula hoops about the dangers of this kind of battery. Lithium ion batteries no matter for cell phones, laptops or LED hoops have been known to catch fire... Below is a extract from an article about new methods to fix the catching fire.
"The reason lithium-ion batteries do catch fire involves tiny lithium particles that form fibers known as dendrites. Over several charge/discharge cycles, these dendrites can accumulate on the battery’s carbon anodes. Once that happens, short circuits can occur, resulting in rapid overheating and combustion. Scientists have previously been able to study the principles of dendrite formation using theoretical models and microscopes, but had not been able to quantify the amount of dendrites formed... "
When I first heard about this I thought that this could never happen to a LED hula hoop lithium ion battery but I was dead wrong. I just recently had two batteries stop working all together and had my third battery literally heat up and almost catch on fire. I was lucky enough to be in the room when I notice great amount of smoke coming from my bag of props. Lucky the battery only melted a hole in my bag but if I was not in the room who knows how bad it could of gotten.
I personally do not know of any substitute batteries for LED hoops. I would just be aware that this could happen to your battery.
Love and Light
Thanks so much for bringing this to our attention Martika!
It's mainly a issue with TrustFire brand batteries used by moodhoops. They are super cheap batteries but are the one of the highest quality for being cheapest lithium ion battery on the market. They are known to have good and bad batch of batteries. Some will last 6+ months with no problem, others will last only a few months and could possible catch fire and/or stop working like mine did.
Is there a brand of batteries similar to TrustFire that isn't so cheaply made but will still power my moodhoops properly?
I'm still researching & shopping around for the best battery to replace my busted ones. So far I've found lots of batteries with the same voltage but it's hard to find the right size battery since foreign countries (where you get the cheap batteries) have different measurements or they don't put the size of the battery. I am seeing lots of trustfire batteries on ebay for good price though.
Was your hoop in use when this happened? Either re-charging or lit up?
no the battery was not even in my hoop when it happened, it was sitting in a cool area in my room. I had used that battery the night before and it worked fine.
really?! wow, that's nerve-wracking. I have a ton of trustfire brand batteries for my moodhoops.
Keep in mind not all trustfire batteries are going to go up in smoke. They have good and bad batteries but because of how we hoopers use them it puts more stress on the battery (dropping your hoop/battery, charging, regular use etc.) It runs the batteries life done and they are already super cheap batteries. I would mainly be worry of old batteries about 5-8 months of use that could be prone to this.
my lithium ion battery exploded in my hoop! it happened because i put my battery in backwards when i wasnt using the lights, thanks for making a post about this and im glad i know why it happened!
Many circuits have this weakness: if you attach the power source backwards it will fry the circuit - in your case, the battery. If the hoop still works with a different battery, you are very lucky!
Thanks Martika! I agree: it sounds like a good batch/bad batch thing, but it's certainly something to look out for! We have had good results with Tenergy batteries, and they also make a LiFePo4 (Lithium Iron Phosphate) type of battery, which is supposed to be a more stable mix. I'm not sure what size or voltage you are looking for, but you might look into it.
When Apple introduced LI batteries in laptops, they had a similar issue, but cleared it up pretty quick. Now most laptops use LI batteries, as do almost all cell phones. So, I'm betting if you see an issue nowadays, it's probably either from damage or cheap construction.