The Turnigy battery that I have is no longer in stock from HobbyKing , and has no delivery date.
Maybe after blowing following only 8 balanced charges at 2.5 amp I should try a different type anyway?
WhenI looked this afternoon they had fewer LiPo batteries in stock than I can remember seeing there before.
Maybe they are about to re-stock?
Bob.
The Turnigy battery that I have is no longer in stock from HobbyKing , and has no delivery date.
Maybe after blowing following only 8 balanced charges at 2.5 amp I should try a different type anyway?
WhenI looked this afternoon they had fewer LiPo batteries in stock than I can remember seeing there before.
Maybe they are about to re-stock?
Bob.
Never too old to learn
Turnigy batteries are good but what is available at any one time tends to vary. I use Giant Power (which Dave Milbourn recommended to me) from Component Shop and Overlander Batteries.
Turnigy batteries are good but what is available at any one time tends to vary. I use Giant Power (which Dave Milbourn recommended to me) from Component Shop and Overlander Batteries.
Scratch building 7 Faireys at a scale of 1:12
Hi Chris,
We have just walked back from Ainsdale Village and it is really hot, but later I will get the charger out and run through the menu options.
To be honest, I have only ever used the charger to charge and balance my batteries and have never used it for anything else, but knowing about the resistance of each cell is not something I had thought of previously, but if it can be used as a “heath guide “ for each individual cell, it would make sense to check it now and again - if especially on a LiPo pack that has a puffed sleeve covering like this one has.
I chose this particular battery to fit in my Remora and made a close fitting battery holder to keep it safely located during use. I think I will check to see if they are still available or if I can find any other 3 cell LiPo packs of this overall size and shape as I think a replacement may well be needed in the near future……and it would be good to have one here ready !
Bob.
We have just walked back from Ainsdale Village and it is really hot, but later I will get the charger out and run through the menu options.
To be honest, I have only ever used the charger to charge and balance my batteries and have never used it for anything else, but knowing about the resistance of each cell is not something I had thought of previously, but if it can be used as a “heath guide “ for each individual cell, it would make sense to check it now and again - if especially on a LiPo pack that has a puffed sleeve covering like this one has.
I chose this particular battery to fit in my Remora and made a close fitting battery holder to keep it safely located during use. I think I will check to see if they are still available or if I can find any other 3 cell LiPo packs of this overall size and shape as I think a replacement may well be needed in the near future……and it would be good to have one here ready !
Hi Bob
That's my servo and battery checker. My charger is a Turnigy. If I was buying now I'd get an Overlander as I buy a lot of their stuff and the Turnigy has been discontinued, good charger though.
If you haven't got the instructions they are available to download from the Overlander web-site. This is the relevant page.
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That's my servo and battery checker. My charger is a Turnigy. If I was buying now I'd get an Overlander as I buy a lot of their stuff and the Turnigy has been discontinued, good charger though.
If you haven't got the instructions they are available to download from the Overlander web-site. This is the relevant page.
Hi Chris
Thanks for your contribution.
You also use an Overlander LiPo charger (these are FlySky re-labeled as far as I know) and I have found them to be very accurate and reliable - but I was unaware of their ability to check the resistance, so I need to scroll through into “unknown areas” until I find it.
I always check the temperature of my motor, ESC and LiPo after every run (nothing clever - just by touch) and I have never had a “hot” LiPo yet, but they do usually feel slightly warm.
This LiPo does have a slightly “puffed” cover that can be pushed in and out a little - like it has some air trapped between the heat shrink and the battery itself.
I will see if I can find the function to check the resistance of each cell, but the LiPo charged normally up to 95% (when I stopped it) last night and each cell had the same voltage reading, so the pack is still balanced nicely.
The heat shrink covering is very tight at each each, so any gas (or air when the pack was made and covered) may be unable to seep away, but I would have thought that any gas (including air) that was under pressure would be able to leak its way out ?
Anyway, the battery has now had 9 balance charges from new, has good balanced voltage readings on each cell…….but it still worries me (a little) so I will search for that internal resistance measurement function on my charger and see if I can find it.
Bob.
You also use an Overlander LiPo charger (these are FlySky re-labeled as far as I know) and I have found them to be very accurate and reliable - but I was unaware of their ability to check the resistance, so I need to scroll through into “unknown areas” until I find it.
I always check the temperature of my motor, ESC and LiPo after every run (nothing clever - just by touch) and I have never had a “hot” LiPo yet, but they do usually feel slightly warm.
This LiPo does have a slightly “puffed” cover that can be pushed in and out a little - like it has some air trapped between the heat shrink and the battery itself.
I will see if I can find the function to check the resistance of each cell, but the LiPo charged normally up to 95% (when I stopped it) last night and each cell had the same voltage reading, so the pack is still balanced nicely.
The heat shrink covering is very tight at each each, so any gas (or air when the pack was made and covered) may be unable to seep away, but I would have thought that any gas (including air) that was under pressure would be able to leak its way out ?
Anyway, the battery has now had 9 balance charges from new, has good balanced voltage readings on each cell…….but it still worries me (a little) so I will search for that internal resistance measurement function on my charger and see if I can find it.
Hi Bob
Your charger may be able to check the internal resistance, mine does and yours looks like a good one. As for values, when I checked my 3S I got 7, 5 and 6 milli-ohms for each cell. For info. search for "internal resistance of Lipo battery". But note that any checks will only give you a comparative result as they vary on battery temperature and charge. Hence my comment to check when new to give a baseline. The lower the better but the results will vary on the capacity of the battery.
With my battery, looking at it more, I think it is due to the heat wrap being tighter at the ends as the curvature is only slight from end to end - see photo. What does yours look like side on? I need another one anyway and so will get the exact same battery and compare it.
Lipos can start to puff if worked too hard, did you notice if yours was hot? Some guys carry on using them if they puff but in less power hungry uses like torches - no bloomin' way!!!
For the number of charges you have carried out there shouldn't be a problem with your battery so maybe it had an issue from the start? That's why the internal resistance check is useful as comparatively it will show if a cell is much different from the others.
Jumpugly - I've got a couple of those little units. But bought mainly to use for servo checking as I prefer to use my battery charger for battery functions as it cost somewhat more and I trust it more!
Chris
Edit: Just checked again and internal resistance is 8, 5 and 5 with each cell being at 3.82v. I've had that battery for a few years now but those values are fine.
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Your charger may be able to check the internal resistance, mine does and yours looks like a good one. As for values, when I checked my 3S I got 7, 5 and 6 milli-ohms for each cell. For info. search for "internal resistance of Lipo battery". But note that any checks will only give you a comparative result as they vary on battery temperature and charge. Hence my comment to check when new to give a baseline. The lower the better but the results will vary on the capacity of the battery.
With my battery, looking at it more, I think it is due to the heat wrap being tighter at the ends as the curvature is only slight from end to end - see photo. What does yours look like side on? I need another one anyway and so will get the exact same battery and compare it.
Lipos can start to puff if worked too hard, did you notice if yours was hot? Some guys carry on using them if they puff but in less power hungry uses like torches - no bloomin' way!!!
For the number of charges you have carried out there shouldn't be a problem with your battery so maybe it had an issue from the start? That's why the internal resistance check is useful as comparatively it will show if a cell is much different from the others.
Jumpugly - I've got a couple of those little units. But bought mainly to use for servo checking as I prefer to use my battery charger for battery functions as it cost somewhat more and I trust it more!
Chris
Edit: Just checked again and internal resistance is 8, 5 and 5 with each cell being at 3.82v. I've had that battery for a few years now but those values are fine.
DaveyBoyzToyz fun run at the Babylon town park yesterday. Damn Lipos...and the mighty effort to save a gorgeous Chris Craft Corvette. 🙄😬😪
https://www.facebook.com/1479377005/videos/pcb.1729376108185245/1580268093488445
What to Do?
At the moment I have put the LiPo into a “LiPo Safe Bag” while I give the situation a little more thought.
Like Chris’s LiPo, this battery may have been a little bloated when I bought it from new - it certainly wouldn’t be the first or the only one - but I do think that this one is a little worse now.
I am not sure how to check the internal resistance or know what is an acceptable reading, but I would like to find out both.
As far as disposing of a LiPo is concerned, back when we were first using much larger LiPo packs for large r/c helicopters and large 1/5 scale racing cars, we were advised of a method to dispose of them that worked and made them safe .
The method was to place the LiPo in a bucket of salt water and leave it for 24 hours (or longer). This had the affect of completely draining it and leaving it “inert” and safe to dispose of.
That was a long time ago. If anyone has any other more up to date method of rendering a LiPo “safe” before disposing of it, I would like to know about it please.
Bob.
At the moment I have put the LiPo into a “LiPo Safe Bag” while I give the situation a little more thought.
Like Chris’s LiPo, this battery may have been a little bloated when I bought it from new - it certainly wouldn’t be the first or the only one - but I do think that this one is a little worse now.
I am not sure how to check the internal resistance or know what is an acceptable reading, but I would like to find out both.
As far as disposing of a LiPo is concerned, back when we were first using much larger LiPo packs for large r/c helicopters and large 1/5 scale racing cars, we were advised of a method to dispose of them that worked and made them safe .
The method was to place the LiPo in a bucket of salt water and leave it for 24 hours (or longer). This had the affect of completely draining it and leaving it “inert” and safe to dispose of.
That was a long time ago. If anyone has any other more up to date method of rendering a LiPo “safe” before disposing of it, I would like to know about it please.
Hi Gang...
Truth be told, as much as I like the high speed and high output I am not too thrilled with Lipos as It seems you need a phd to fully understand them. I don't like the small margin for error in charging and discharging them either. But I do know that a bloated battery is a battery that has gone bad and can be a huge problem.
I don't mean to run around like the sky is falling, but I found this particular article helpful. 👍
https://www.ufinebattery.com/blog/how-to-dispose-of-swollen-lithium-polymer-battery/
Hi Gang...
Truth be told, as much as I like the high speed and high output I am not too thrilled with Lipos as It seems you need a phd to fully understand them. I don't like the small margin for error in charging and discharging them either. But I do know that a bloated battery is a battery that has gone bad and can be a huge problem.
I don't mean to run around like the sky is falling, but I found this particular article helpful. 👍
Man, I would. I put it in my neighbor’s yard to charge! Not really as this is, as Jump states a SERIOUS problem! Get rid of it ASAP. (Not sure how one does that).The bloating is caused by one or more of the cells outgassing. Quite probably a prediction of a boom & or a fire.
Man, I would. I put it in my neighbor’s yard to charge! Not really as this is, as Jump states a SERIOUS problem! Get rid of it ASAP. (Not sure how one does that).The bloating is caused by one or more of the cells outgassing. Quite probably a prediction of a boom & or a fire.
Imho. Stop the charge asap. A bloated lipo is a lipo to be disposed of. There is some sort of chemical breakdown occurring during use. The trapped gas in the bloat is a fire hazard. Get rid of it.
Imho. Stop the charge asap. A bloated lipo is a lipo to be disposed of. There is some sort of chemical breakdown occurring during use. The trapped gas in the bloat is a fire hazard. Get rid of it.
My 3S looks a bit bloated as well but it could be that it was always like that but I can't remember. But like you it has only ever been charged and storage charged using a smart/intelligent charger. One thing I did read about awhile ago is checking the internal resistance of the battery which I was able to do using my charger and it was within acceptable limits, so I will do that again. What is recommended is that you do this when the battery is new as a reference point, which I will do with any new batteries I get.
Chris
My 3S looks a bit bloated as well but it could be that it was always like that but I can't remember. But like you it has only ever been charged and storage charged using a smart/intelligent charger. One thing I did read about awhile ago is checking the internal resistance of the battery which I was able to do using my charger and it was within acceptable limits, so I will do that again. What is recommended is that you do this when the battery is new as a reference point, which I will do with any new batteries I get.
As my Remora was charging around the lake today, I happened to comment to my friend Adam (who was with me making the short video of the Kopy Kommander for Boatshed) that I didn’t think the boat was revving as hard as usual.
He laughed as the boat is a superb performer, but when it came back to shore the LiPo was bloated as the heat shrink cover had ballooned slightly.
I have just put this LiPo on a balance charge and noted that all three cells are showing a very similar cell voltage with a 51% fuel available. (see charger port A).
…..suggesting that the battery is OK ?.
I always put a small strip of masking tape on each of my LiPo batteries and add a mark after each charge - just so I know get many times the battery has been charged.
It is worth noting (when counting these “five bar gates”) that this battery had only been charged 8 times from new, and every charge has been a balance charge on this RC-DC100 charger, so it has not been abused in any way.
I am charging it outside on the stone paving - just to be safe………..
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As my Remora was charging around the lake today, I happened to comment to my friend Adam (who was with me making the short video of the Kopy Kommander for Boatshed) that I didn’t think the boat was revving as hard as usual.
He laughed as the boat is a superb performer, but when it came back to shore the LiPo was bloated as the heat shrink cover had ballooned slightly.
I have just put this LiPo on a balance charge and noted that all three cells are showing a very similar cell voltage with a 51% fuel available. (see charger port A).
…..suggesting that the battery is OK ?.
I always put a small strip of masking tape on each of my LiPo batteries and add a mark after each charge - just so I know get many times the battery has been charged.
It is worth noting (when counting these “five bar gates”) that this battery had only been charged 8 times from new, and every charge has been a balance charge on this RC-DC100 charger, so it has not been abused in any way.
I am charging it outside on the stone paving - just to be safe………..
