|Nick Farrow||18/09/2019 11:00:44|
|157 forum posts|
I have a number of lipos that are showing something like 60-70% of their capacity. They 'sag' quickly when used and when put on a discharge/charge cycle confirm that the capacity is reduced.
I was wondering what to do with them, they can be used for flying but with such a restricted and diminishing flight time they a a bit of a liability. On the other hand they still have some useful capacity, but I have yet to find a use for them!
Time for the bin, or do you have any ideas! ??
|Geoff Sleath||18/09/2019 11:17:52|
3355 forum posts
If you still have some ic engines then they may work OK on an electric starter - saves lugging a heavy lead acid battery around. Or use in something less critical like a small rc car, perhaps?
Our bathroom radio is mains/battery but we use it with batteries. It's an ageing Roberts which should take 6 'D' cells, which would be costly, but I've modified it to take a 7 cell NiMH 3000 mAH pack. That pack has been in use for over 5 years but perhaps your old LiPos might be used in something like that.
|Martin Harris||18/09/2019 11:27:30|
8793 forum posts
While old NiMH cells are fine, I would be wary of using old LiPos around the home due to the fire risk.
|Brian Hammond||18/09/2019 13:43:54|
|299 forum posts|
Replaced the battery in my Lidl drill with an old Lipo and it is better than new and lasts longer!
|Old Geezer||18/09/2019 14:11:40|
|611 forum posts|
Like Geoff - I use a pensioned off rechargeable - in my case a 4S 2300 LiFe flight pack - so much lighter than the alternatives and never seems to need topping up ( but I do anyway, when I think about it ). I would never use the LiFe in another airframe - this one cost me a much flown ( & much loved ) hack when it browned out a Spekkie Rx when I tried go round again when I overshot a landing. I know - that's why we have timers. Carelessness costs airframes!
|Don Fry||18/09/2019 15:41:00|
3910 forum posts
I've got a HobbyKing USB CHARGER. CHEAP.
Plug any 2-6s lipo, or any other li chemistry battery. It tells you the individual cell voltage. And it has a USB socket in the ther end. Currently running this I Pad.
has auto shut off, will not over discharge the lipo.
I would also second the use of old lipos for engine starters. I favour 4 s for 12 volt starters. I find it minimises switch welding.
|Chris Walby||18/09/2019 16:27:13|
980 forum posts
I pensioned off an old and slightly puffy lipo for starter duty, only problem was when I came to recharge it (not balance, but C1) the lipo puffed up and then vented!
I would be inclined to dispose of them at end of life and be very careful of using and especially recharging lipos that no longer perform well.
26 forum posts
When they start to deteriorate,I use my old 3S/4S LiPos for things that used to be driven by 12V lead acid batteries. Such as the compressor for my air retracts, electric starter, i/c control panel, field charger etc
Edited By BikerDon on 18/09/2019 16:36:17
|Nick Farrow||19/09/2019 16:54:53|
|157 forum posts|
I just wanted to make sure I was not missing a trick
I am nevos of using them for household devices, like you. However I do strip them down and pick the 2 best cells and use them for a tx power source (with a voltage regulator) that seems to work for me.
Just as an aside, would you expect new packs to balance? I have had some 1800mah (nanotech) from hobbyking that wont balance, Do they accept them as returns in this case?
26 forum posts
A lot of my LiPos don't balance, they just sit there balancing on my budget charger until it times out at 120 mins. I would be more likely to blame your charger if its not a decent (£££ ) one. The way the budget ones balance is really naff - they just bung a resistor across the cells with high voltage while charging, this really isn't ideal. Trust me I was an electronics engineer for many years...
Edited By BikerDon on 19/09/2019 20:09:33
Edited By BikerDon on 19/09/2019 20:10:01
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