FiddleSticks Posted September 24 Share Posted September 24 Puit on my nice clean hoody today... an hour or two later i realised i had something in my pocket with wires. Lo and behold it turned out to be a lipo from my XK A800 electric glider. Whoops... Good job i bought a spare.. I'll just dig that out of the Tranny box where we keep batteries etc... Oh dear.. can't find it. Will pick up the hunt for it later after the school run.. Get home, carry on looking.. found it.. in the very same pocket as i found the other one (how on earth i never found it there earlier is beyond me - i'm officially getting old and stupid). So they've both been through the wash - both have their sticky labels completely gone that I put on them (I'm building up a database of batteries, trannys, RC's, aircraft etc - consequently everything is numbered so it can be matched to other equipment). So after all that (congratulations if you've managed to keep reading this far).. whats the likelihood of either lipo still working or recharging with no problems? There's no swelling but i can't find my multimeter to check their voltages.. Advice please.. Quote Link to comment Share on other sites More sharing options...
GrumpyGnome Posted September 24 Share Posted September 24 Check your trouser pockets...... 1 8 Quote Link to comment Share on other sites More sharing options...
MattyB Posted September 24 Share Posted September 24 (edited) 7 minutes ago, FiddleSticks said: Puit on my nice clean hoody today... an hour or two later i realised i had something in my pocket with wires. Lo and behold it turned out to be a lipo from my XK A800 electric glider. Whoops... Good job i bought a spare.. I'll just dig that out of the Tranny box where we keep batteries etc... Oh dear.. can't find it. Will pick up the hunt for it later after the school run.. Get home, carry on looking.. found it.. in the very same pocket as i found the other one (how on earth i never found it there earlier is beyond me - i'm officially getting old and stupid). So they've both been through the wash - both have their sticky labels completely gone that I put on them (I'm building up a database of batteries, trannys, RC's, aircraft etc - consequently everything is numbered so it can be matched to other equipment). So after all that (congratulations if you've managed to keep reading this far).. whats the likelihood of either lipo still working or recharging with no problems? There's no swelling but i can't find my multimeter to check their voltages.. Advice please.. Are they completely dry at this point ( connectors etc) if so I would just Just plug it into your charger, review the cell voltages and then measure the IR if your charger can do that to see if they have suffered any internal damage Then if they pass that test I would put them on a very slow 0.5C charge and monitor the cell voltages very carefully during that process for anything untoward Eg uneven/ unbalanced definitely charge in the garage on a concrete floor this time around until they have proved themselves ok. Edited September 24 by MattyB Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted September 24 Share Posted September 24 Peg em out on the line, do not Iron. 1 8 1 Quote Link to comment Share on other sites More sharing options...
Robin Colbourne Posted September 24 Share Posted September 24 Its often said that one should cycle one's rechargeable batteries, though not usually on the spin cycle. 2 Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted September 24 Share Posted September 24 Done it with a mobile phone ! whoops! 1 Quote Link to comment Share on other sites More sharing options...
MattyB Posted September 24 Share Posted September 24 28 minutes ago, Robin Colbourne said: Its often said that one should cycle one's rechargeable batteries, though not usually on the spin cycle. Not lithium chemistry you don’t, it doesn’t do anything good other than add cycles you could have used for flying instead 1 Quote Link to comment Share on other sites More sharing options...
kc Posted September 24 Share Posted September 24 My advice is ..... Fish the labels out of the washing machine if you can.....BEFORE they get stuck in the waste and cause a problem. 2 Quote Link to comment Share on other sites More sharing options...
kevin b Posted September 24 Share Posted September 24 Good to hear you are using clean energy. 🤣 1 3 Quote Link to comment Share on other sites More sharing options...
Don Fry Posted September 24 Share Posted September 24 This episode reminds me of a low inverted Bader of the patch. Crushed rock. Too low, too fast, and it basically wore away, very quickly. The bit that’s welded in the memory, easing down elevator in, and the rudder, vertical stabiliser leaving chips of wood and dust behind, as they wore out. Seriously, I can’t see a problem, charge, check, enjoy. Quote Link to comment Share on other sites More sharing options...
Robin Colbourne Posted September 24 Share Posted September 24 3 hours ago, MattyB said: Not lithium chemistry you don’t, it doesn’t do anything good other than add cycles you could have used for flying instead Hence my careful use of the word 'rechargeable', not 'lipo' 🙂 Quote Link to comment Share on other sites More sharing options...
leccyflyer Posted September 24 Share Posted September 24 Sounds like an excellent additional reason to not put lipos in your pocket. Given the frequency with which inadvertent pocket calls are made with "smartphones" the proximity of car keys and lipos would give a tangible risk of a short in the shorts - not a good look.😮 Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted September 24 Share Posted September 24 If you washing cycle was at a green 30c the temperature should not have effected the LiPo any higher it likely would. Constant immersion in water could have discharged it a bit. If another hard item in the wash has punctured a cell in any way the soapy water will certainly kill that cell. As suggested see what the current cell voltages are and make a decision from there. 1 Quote Link to comment Share on other sites More sharing options...
Phil Green Posted September 24 Share Posted September 24 (edited) I would check the connector, a lot of detergents are salt based and in warm water there would be electrolysis and consequently maybe a slight corrosion of the contacts 🙂 Edited September 24 by Phil Green 1 Quote Link to comment Share on other sites More sharing options...
FiddleSticks Posted September 25 Author Share Posted September 25 Well.. having finally found my meter... both lipos (2s) are holding at 8.3V which unless I'm told otherwise, seems healthy to me. One was already charged before its clean, the other was flat. When i put them on charge last night, one instantly lit up as full, the other took around an hour to charge. I guess the only real way to know how they perform is a test flight?? 1 Quote Link to comment Share on other sites More sharing options...
Nigel R Posted September 26 Share Posted September 26 On 25/09/2024 at 00:30, Phil Green said: I would check the connector, a lot of detergents are salt based and in warm water there would be electrolysis and consequently maybe a slight corrosion of the contacts 🙂 good shout a liberal dose of contact cleaner is due, perhaps Quote Link to comment Share on other sites More sharing options...
Nigel R Posted September 26 Share Posted September 26 14 hours ago, FiddleSticks said: I guess the only real way to know how they perform is a test flight?? or use your charger to do a discharge/charge cycle (fewer airframes involved etc etc) in reality, if they're still showing a decent level of charge, then they're probably just fine Quote Link to comment Share on other sites More sharing options...
MattyB Posted September 26 Share Posted September 26 22 hours ago, FiddleSticks said: Well.. having finally found my meter... both lipos (2s) are holding at 8.3V which unless I'm told otherwise, seems healthy to me. One was already charged before its clean, the other was flat. When i put them on charge last night, one instantly lit up as full, the other took around an hour to charge. I guess the only real way to know how they perform is a test flight?? No, As per my first post in this thread if you check the i internal resistance with your chargers and then use a online calculator to calculate the actual real world c rating I’d the pack, that should give you some confidence there has been no major internal damage of it is within 25-30% of the advertised c rating https://www.radiocontrolinfo.com/information/rc-calculators/calculate-the-real-lipo-c-rating/ Quote Link to comment Share on other sites More sharing options...
FiddleSticks Posted October 11 Author Share Posted October 11 Well I'm glad to report that one lipo still functions, the other remains untested. @MattyBmy charger doesn't have that ability unfortunately. It's just a bog standard charger that changes the LED colours once charging is done. Quote Link to comment Share on other sites More sharing options...
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