Is Your LiPo Safe To Charge | WHEN TO THROW IT OUT
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- čas přidán 1. 06. 2024
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This might be the most important video I've ever made. Because if you mis-treat your LiPo batteries, they can turn on you, and literally burn your house down. So you have to learn the warning signs of when to throw out a lipo.
Is your LiPo safe to charge? If you watch this video, you'll know the answer.
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This 100-watt, 2 ohm resistor will result in about 6 amps flowing when plugged in to a 4S battery. Great for discharging.
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"OH NO! That's a 6 cell!!" LMAO!! 🤣😂🤣 Your entertainment value alone is worth the patrion... The extra knowledge is just a bonus!
omg I'm crying at my desk trying to learn about lipos. What a moment
Lmao. As soon as he plugged it in it looked like Jesus just walked in Joshua’s room lol.
I left a 3s plugged in when I was just getting into RC. It was dead as a doorknob the next day. I used NiMh mode to restore it and it seemed to work fine for a little while. (Being used for a hovercraft) I was charging it while watching a youtube video of someone turning a pancake on a lathe and I heard a loud thud and turned over to see several feet of red orange flame coming out of my dresser drawer. I dumped out the contents of the drawer and wrapped them up in a rug to stop the fire, this did not work and the lipo ate it's way through the rug and damaged the floor. (dorm) When it finally stopped burning there was nothing left but some bits of what looked like copper foil, a very destroyed rug, and one unhappy roommate.
This is why I don't suggest "recovering" dead LiPo :-)
Thanks for sharing this example.
Lol u hang the battery to kill it
Hung in the closet for a slow and painful death... He had a lot of energy in life and will be sorely missed.
He tried lithium treatment and shock therapy for his depression but in the end, it only left him with a damaged brain cell
Just like Epstein
JB: "Don't roll the dice on lipos"
(Rolls dice in closet)
Honestly, that did actually baffle me. I would in that Le Drib battery still use it, just with precautions well before I'd discharge it inside the closet like that with no fire prevention like a lipo bag. lol
Bash with hammer. Return to Drew for giggles.
@@fpvwing I've heard of a guy, I cant remember who but he took his retired lipos into the desert and would do target practise on them ;p the lipo exploding is a nice hitmarker
@@lukagroot7409- I've done that a few times, my buddy has property out in the sticks where he hunts and goes 4-wheeling. We'll gather up all our bad lipos and head out there with our rifles, it's actually more fun shooting them with just a little .22cal round, does just enough damage that come apart pretty violently, bigger calibers sometimes just blow them apart before chemical reaction can start.
I got a bucket of saltwater
I really want more of these lipo safety contents. I just got into this fascinating hobby but since I started flying quads I can't stop feeling anxious about fire issues.
Ok I'm at work and freaking out now "gotta check those lipos"
naughty naughty watching videos at work.... tut tut tut
Joshua...please...I can not sleep at night...GET THAT THING OUT OF THAT CLOSET!
What about if it's in a lipo bag,, well I'd say it still cause a fire what a metal bullet box? What's safe nowhere really outside burried
My lipo is on my table next to my bed 👀
Finally a video that tells you throw it out and not do something stupid like trying to fix it! The price of a battery is not worth a fire period
Just had a 1st hand experience with that thumbnail. Got my first FPV setup and no simulator prepared me for this... The bms lead got sucked into my ducted frame and diced up, broke a wall piece, dinged my prop, and punctured a cell! There was definately a fire. 🔥
This and your “65 FPV Tricks” video are over a year apart, yet you looked the exact same in each video… same shirt. Haircut. Clean shaven. Same weight. Same everything! Your an ICON in this community, good sir, and we thank u!
back in the first years of lipo I remember how many homes and cars were burning down from them, it was way more common than most now realize, I have been in this hobby a long time.
Uh oh. Stealing batteries from the boss man eh? Is that like taking home office supplies for you guys? :)
lol
... and then killing it none the less.
As always, thanks for the very useful nuggets of knowledge! This is something i've been very curious about for a while and you've answered all of my questions.
Great video! Ordered the battery checker from your link!
Joshua, Another great video! This should be a must-watch-video for all newcomers to FPV! Thank you!
Thanks man, this was a really informative video, Love the infrared at the end.
This vid is just what I needed! Thanks! From total fresh start beginner!
I love your lipo / current / charging explanation series. I always get something out of it that I didn’t know before.
If you are discharging a damaged battery, I would recommend discharging through the voltage balancing terminals. Discharging through that low impedance resistor is dangerous, because the weakest cell can be reverse charged by the stronger cells. That GREATLY increases the chances of a conflagration in that cell, which will light all the rest of them. An individual resistor between each of the balancing leads will guarantee that all the cells fully discharge, without reverse charging the cell(s) that's bad. you want to give each cell its own resistor. some cells will take longer to discharge.
If that's a .5 Ohm resistor, a 4 s battery will put ~28 amps through it. You don't want to use a value that low, if the battery has a weak cell. The cell will have almost that much resistance, and will surely heat up. It would be better to use 5, or even 10 Ohms or more, to discharge over a longer period of time, to avoid heating weak cells. 1 to 2 Ohms would be appropriate, for discharging individual cells, using the balancing leads. That's definitely the safer way to discharge a battery for disposal.
Thanks for the video Josh, this is one of the portions of the hobby that I've always been a bit worried about... and my wife is always pretty freaked out about.
Thanks so much for this Joshua, especially for us Newbie's, we need to learn these things. And old pro's need a healthy reminder too :)
6 cell with the light haha was thinking holy crap that’s bright 😂
Thanks for the vids. I watch your channel loads. This was exactly the vid I was looking for. I'm new to the hobby and have started charging battery's outside because I wasn't so sure. Now I know. I have definatly learnt something today.
I have been charging lipos in parallel for years and there was a lot I learned from this video. Thank you.
Thank you very much, JB 🙏🙏👍❤️
Thanks so much for making this video! I have 2 Tattu 4s 1300/1550 that both lost a cell around the same time. I was curious as to how to dispose of them properly, love your videos man, great content and information!
Thnx JB have about 3 suspect batteries I need to check, great reminder
I always enjoy your videos. You seem to do quite well explaining things in logical term. I think you have something I lack but I’m learning which is patience! Lol. Thanks again ✌️
Love the infra red image at the end...
This was so helpful you can get lots of info on how to charge but there's not much for looking for signs of a bad cell or a pack. Great video thanks J.B
Great advice - Thank you.....
just wanted to thank you for all your videos it has been a long time since I messed with lipos and this info is priceless Thanks again. Do you have any batts you recommend ?
Nice tip on the parallel charging. I use your boards exclusively. I noticed it was having a hard time balancing at the end . Taking a lot longer than normal so I shut it off and yeah I had a bad cell
Excellent lipo discharging product!!
I picked the wirewound resister from the link below to get rid of about 5-6 batteries that I had set aside to discard. Worked like a champ, even for my RC 5000 mah battery. Cheap piece of mind while I keep my batteries inside for the winter!
I was at a fly in last Sunday, there were some lipos being charged under the pavilion. Me and another guy heard several loud ticks (like a spark plug) so I went over to the charging station and had a look. Nothing out of the ordinary so I continued to watch the airplanes. About 30 seconds later a large hissing and a second later a deep woosh as I looked over there was a good foot of flames being shot out of a lipo, nearly scorching a guy who was trying to fetch some hush puppies from the tray. The intense flames lasted about 15-20 seconds, a member of the club used their fire extinguisher, but it was very small and let out a "poof" then quit. A second guy grabbed a larger one to prevent the building catching on fire. Lessons learned:
1) Use a lipo safe charging bag
2) Have a proper fire extinguisher around and know where it is stored.
3) Do not charge lipos near or in buildings
4) Lipos are dangerous, never think yours wont shoot mad flames (they might)
Great info JB thank you!✌🙏👍
Thanks for the info Josh...👌🏾
Thank you for stressing safety in this great hobby.
Wow! I wish you made this video a long time ago!!! Very useful and informative. Thank you for the great information! 😂
Always teaching us we thank you JB ! All of us!
Thank you for your good sharing. It is crucial to beginners like me. 👍🏻👍🏻👍🏻
Many thanks, from a newbie.
thanks for this video bud. i was needing this information right now.lol you might have saved my house
you have nice equipment and you seem intelligent you been around and done this before and it shows so I must say thank you very much I paid close attention to what you are saying. Thanks for being out here you're one heck of a nice guy.
AH C'MON!! SERIOUSLY?! watched this before going to bed. Up in the middle of the night to check the 3s I had powering my goggle on a pololu where 2 cells had dropped to 1.7v. I'd brought it back to life but it's now in ammo box, 3 miles below the surface of the earth, somewhere very safe, being monitored by 'top men'. Top. Men.
Thank you for making that video
I'm glad you spoke about taking calls out to make a smaller battery. Yes, it can be done, and pretty easily at that. I suggest using snips to disconnect the POS and neg of the bad cells instead of desoldering anything. Then solder the leads back properly and cut the balance lead to the new size.
Great video and very informative as always, Joshua. I'm new to RC and I was waiting for you to tell us the best way to DISPOSE of a bad battery. I'd be a little apprehensive to just toss in it the trash and hope it doesn't catch the garbage can (or garbage truck!) on fire... Subscribed!
Thanks. Nicked a section of a balance plug. I figured it was simple like you showed but I had to watch the man himself say " your going to learn something today" and show me the method before I was confident enough to change the little balance connector. Nice explanation as always. God Bless you and your family brother
You missed one of the biggest signs of impending failure which is puffing. In industry offgas detectors are used as an early warning sign of failure and anytime a battery stays puffed its a sign of damage.
Just got into FPV a month or so ago and have learned so much from your videos!!! I knew lipos had a risk of fire so the first thing I bought was a fireproof battery bag. This video also included very informative information and I checking all of my packs tomorrow. Thank you so much!
Those bags do nothing. use a 12x8 and a 13x9 glass baking dish leaving room for ventilation. Contains the fire and heat without expelling anything.
Great informative video Joshua!!
OH NO THAT'S A SIX CELL! watching this at 1.5 speed was hilarious, but its the only way to watch JB talking videos.. love you JB
Excellent safety info, for sure, thanks! Makes me wonder about Lipo storage options in our homes. Do you keep yours in a fire proof safe? In the bird house down the driveway? You know the one we all smack into in Lift-off?
Good video man, thanks!
Perfect timing for this video mate
Brilliant! thank you sir.
Awesome info thank you!
Great vid bro. Thanks👑
Good points Joshua. Due to the Irish weather, my batteries are most of the time on storage charge :-) and in tin biscuit boxes lined with baking paper and stored in 50x50x50cm floor tiles box in my garage. When we're going away in the summer, I'd clean up the stove and shove them all there for a piece of mind
Saying youd never leave that discharge setup unattended is an example of good intentions. If there were a valid enough distraction (emergency etc) it would be easy for anyone to forget what they were doing. Since it would be trivially simple to just bring the resistor outside why take the chance? The cells youre discharging are already condemned as faulty. Seems like a bad idea to give them their final discharge in the very place youre trying to protect.
Best way to discharge a lipo is to throw it in a burning fire pit for a few hours. No?
@@thomasmiller6712 No
He said he leaves it hanging there over night in the video
Thanks for the reminder, it's never too much. You mention spontaneous fire but I'm not sure there are too many of those. I believe most of the time it's during charge or discharge. The main source of fire is obviously crashes, and for me the close second is pulling hard on a tired lipo : you land and one of the cell is puffed and smelly. As mentioned in another post some chargers have temperature probes and I find a 5eur smoke detector next to the batteries reassuring also.
Thank you so much for the info! Also, I definitely understand what you mean about not taking any risks. I have a $350 crawler, with almost $450 in upgrades. I'll throw out a $40 battery before risking burning up $800 worth of rc car.
Glad you mentioned the parallel charge problem because that's the real risk with a bad cell!
great video! thanks for that…at the end i am a bit confused though. so why shouldn't we discharge a damaged battery it with the charger?
Rolled the dice on a CHL 4S that got discharged when I got stuck in a tree. I recovered it, and it held storage within 50mV over the course of 8 months.
what a nightmare, getting a drone that turned on (obviously) stuck somewhere you cant get to
Thank you!
Good info. Thanks
i had a 2s pack with low resistance matching cells, 15 min after charging it blasted off, 3rd floor apartment had to throw it out the window
Cool, Thx for the video.
That's a cool topic, I see this question ("Is it still safe to use?") on Reddit all the time.
Everytime I'm thinking to myself 'if you've got to ask, it's probably not...' ,D
I learned something today. Wasn’t awRe of the risk of damaging all batteries connected to a parallel charge board if one battery is bad. Thank you 👍😎🇦🇺
Great bit of info JB, lets just hope people listen. I cut the power cables of ( ONE AT A TIME ) Then leave them outside for 2 weeks in a bucket of Sault water ( Heavy on the Sault )
I discharge dud LiPos in half a bucket of very salty water outside. I cut the plugs off (1 lead at a time) , and leave the battery in the bucket for a week or till the leads stop bubbling. I then check for any voltage, and if it's dead, drive a 6 inch nail through it just to make sure. Works every time.
I'm a noob and Mr. Bardwell is Outstanding!!!! I've been able to progress with confidence and watching his video makes me want to learn more about the hobby!!!!
Thanks Joshua!! Very informative video!! For new and old people in this hobby!! We kinda forget how dangerous a lipo is...
your method of discharging the packs is far more likely to start a fire than the actual battery itself. You have the crazy hot resistor mounted under a shelf with flammable stuff above. Brilliant.
I know how hot the resistor gets. I have a FLIR camera. It won't start any fire :-)
great advice JB I have a questionable battery decided to retire it. because of this video.
I crashed 2 years ago and broke something in my quad and never got around to fixing it. My 3 tattu 4s battery’s sat for the last 2+ years. Two were plugged into a parallel charging board and one by itself.
I just bought a diatone f5 after seeing JBs review and tried to charge the batteries up. The one sitting solo was fine at 3.7v per cell. The two in the parallel charging board had two cells at 3.7 and 2 cells at 0... I tried to revive one and it was drained the next day. Glad I saw this video today and they will be going to the great battery place in the sky.
I bought an early LiPo car engine jump starter. It worked amazingly for about 3 times. Then I started my freshly painted car with it. While I was driving it on the yard to the shop, the battery exploded into flames and damaged a new very expensive paint job. Never again.
Great video mate👍🏻
Great video and I go as always. I just crashed and my battery looks banged up, but the cells are all balanced, and the resistance is no different than other batteries. The other battery resistance ranged between 9 and 2, and this banged up one is 3-8 range. Looks like I’m ok?!
good clip/review. what about battery puffiness? Is that a significant enough warning sign? Further checks? thanks.
Yes definitely. If it puffs, get rid of it. i currently have a 4s thats a bit puffy. but it holds a charge. still.. very soon ill be replacing it
VERY wise advice for radiomodellers. Damn good video!
I put a 12 volt peanut bulb across the balance plug, put the battery and bulb in a tall metal can (not sealed tight) in a metal sink and let it discharge all day into the evening.
That last shot with the pack over 60 degC while it discharges just confirms my opinion that it's unsafe to discharge the pack like that. If the pack's getting that hot then you're probably pulling a lot more amps than you think. Or that pack is just so damaged that it's unsafe to discharge it at even 2 amps.
Yeah, I've tried to make it add up but I can't, I feel like I'm missing something. He said in the vid it was a half ohm 60 Watt resistor, he links to a 2 ohm resistor in his description and says it'll be 6amp on 4S, which is true if discharged already in RC but at full charge over 8amps.
A half ohm would be over 32Amps at full charge.
A new 1500mah 4S could probably handle 30Amps or more new depending on the C rating.
60 celcius is an ok temp for a battery in heavy use.
However I'd go for a safer slower discharge myself.
I hope my math is correct, some of the things he was saying wasn't adding up or maybe he changed how he did it or was talking about different things.
For all of you who are not paying attention to his safety methods for discharging a LiPo in the closet, he is using a thermal imaging scope to see how hot the battery is getting. To me, that is pretty safe. As the battery gets discharged, the heat dissipates and the battery will just keep getting cooler until it has no energy left. He monitors the battery until the heat is low enough not to be dangerous with a thermal scope! Let's not over look that! I know I don't have one of those.
Also, as the cells appear on the scope to be white hot, like super hot, if he displayed the actual temperature, the white areas are probably not super hot, just warm. I doubt it is above 40 degrees Celsius (104 F), which is safe, even in a closet. You also need to put it in perspective, he is way more knowledgeable than 99% out there, so I think trusting him to do the right thing for him is not the same as you trusting your situation will be equally as safe for you. If he found an issue which would make it dangerous to discharge that battery in this manner, it is a safe bet he would do it differently.
Thanks
My flying buddy bought me an old Army surplus ammo can. He put some wholes in the top. I keep my Lipos inside at all times.
a friend left a 5s pack at the bottom of a river for a day (long story) and i recharged it just for kicks, what i learned is you can't tell when modern packs are starting to puff because of the aluminum/composite plate they put on them now, if you cut the heatshrink you can tell if they are puffed a lot easier. good points about checking to see if one starts self-discharging and testing internal resistance. also i can't think of who made the video but i'm considering making a portable battery charging box out of a small metal tool box just to contain things
hello;
thank you for this video explain...
with smart battery (dji, autel, yeneec...) there is no cable out battery, so impossible to test resistance..
is there a possibility to see the internal resistance of this kind of battery, like you do in this video?
thank you.
Mine are always stored outside and charged outside, in dry conditions. Take zero chances because it only takes one bad battery to lose everything.
Good video !
Nice info, especially that 2 ohm resistor, a bargain at $8 and change...placed into cart for next Amazon order:)
I just ordered one and there was only seven or eight left so you might want to just place the order
Most people have no idea how important a good battery is.. The first time I put a "MaxAmps" battery in my 1/10 scale 2WD monster truck, and it broke 60 mph!! I learned in that moment, just how important the battery is to RC performance...
Excellent excellent video let's stay safe
How does this apply to my DJI Air 2 S batteries? As to how many cells it consists of is completely unknown to me. Or should I have the same concerns that you are presenting with a different type of battery? Thanks for your input!!
Those are cool little gadgets that you got going on there I have nothing but some 2s batteries and a wall charger don't know what else I need.
If you haven't memorized the voltage of a 6s, why don't you use the average cell voltage? I fly 1,2,4 and soon 3s so i think the average cell is easier to use. Thanks for this vid jb, i really did learn something today.
This is a good and important topic. About the lowest discharge voltage that is still safe i am not sure if 3.0V is a problem, esp. when loaded. At a high load a voltage of 3 V isn't a problem imho but with no load its the end. Most cells are fine until 2.5V (normal 18650 li-ion) but 3.0 V is safer. LiPos are much more dangerous esp. with high C ratings and energy density.