Today, a friend of mine dropped his phone in the lake.
After retrieving it, the phone was dead, and now he’s trying to revive it by drying it out.
Fingers crossed 
3 Likes
Without taking out the battery you’re basically creating a fire…
Fingers crossed that you can see this and remove it asap.
2 Likes
Why not?
But wait… what filament did you say it’s drying again? 
1 Like
This would probably work, but I wouldn’t go above 40°. Lipo’s can degrade or get damaged much above that. And damaged lipos can catch fire.
2 Likes
It depends on the temperature he’s using. I’ve dried a lot of electronics in my dryers before—low temperature over an extended period is generally safe.
I even heat phones to around 60 °C to soften the glue for disassembly and repairs. I haven’t had any incidents so far, but caution is always important.
Safety first.
2 Likes
Heating like that is safe because it doesn’t take long to soften the glue on the heatbed, but he’s cooking it in the AMS for… I don’t know how long…
Most phone batteries are rated up to 45C. And the phone here is already dead meaning a build up of conductive stuff or corrosion has already been there. Which makes the spicy pillow even more spicy.
1 Like
LiPo batteries can certainly pose a fire hazard, but modern mobile batteries are no longer open-cell and are therefore not as sensitive as they used to be.
That said, I’ve had a few RC models catch fire mid-air after abusing the batteries or continuing to use them after crashes. 
So always handle LiPo batteries with great care.
1 Like
Better mid-air than in the house
1 Like
You’re better off leaving the phone over a day or two in a container full of silica beads
4 Likes
How no one suggested rice yet? Or printing an overenginneered centrifugal drier?
1 Like
This right here is your answer.
STOP KILLING CPUS TO MAKE SILICA BEADS !
Go natural, use Rice !
2 Likes
Rice is not as effective as a desiccant as silica beads… And I don’t think we’re anywhere near a shortage of silica…
Study comparing rice to silica gel/beads
TL;DR in a DRY region, it seems to work around as well, however if you need fast or are in a wet/humid environment, use Silica.
1 Like
Is rice reusable? IIIIIII doooon’t knoooooooow… 
2 Likes
You can still use it for your next meal 
6 Likes
Even after its reusable… or you can use it as many times as you want as a joke, it wont deplette cause these guys dont know what a joke is (or they know and their pathfinding ability is really malfunctioning, ie joking in a charged thread locked in on troubleshooting, not recognising jokes in joke-threads yada yada)
Anyway… Gerrit… pilaf?
2 Likes
Thought you didn’t have time for jokes?
1 Like
Thought you didnt accept “no jokes” , tried to fit in , we have a clear cultural gap, so ill stick to joking with people who get it,on one hand, and stick to efficiency with the rest while ignoring anything nonusefull. Even the time I waste to write this comment exists just because im on the toilet instead of the lab. Want me to revert back to pure efficiency and machine-like procedures? sure works more for me , really.
1 Like
Fire? Not a likely outcome unless there’s noticeable swelling of the lipo cell.
The energy stored in a cellphone LiPo battery isn’t tiny, but drying it in the AMS is no riskier than tossing it in the garbage or even leaving it on the table.
User would have better luck saving the phone by putting it into a significantly greater amount of dessicant or rice (submerged in rice in a gallon bag is a good approach).
Rapid discharge of a lipo -can- cause swelling of the battery, which -can- cause rupture, but that’s not a common failure mode from a wet cell phone. Without a continuous source of moisture, heat from current flowing through the device will evaporate the moisture conducting the current. Drying it out faster will reduce that risk.
To play it extra safe, strongly advise user to keep an eye out for noticable swelling. Otherwise, you’re likely fine. Can’t say the same for the cell phone. LCD screens are rarely the same after exposure to moisture. If you see swelling, do not toss in trash; take to a disposal center. Many landfills and recycling centers accept swollen batteries for safe disposal.
1 Like
was about to reply to this
like… batteries get hot; particularly when they charge and discharge rapidly. its why so many phones will opt for a slower charge during hours it knows it isnt going to be used much (or if set by the user). you’re more likely to need your phone sooner when you’re up and about so yeah.
like the cpu can easily hit 90C in even modern phones and with how thin they are nowadays (and how they lack any or all airflow and often insulated in both a rubbery plastic case + your pocket/bag) means the batteries have to be able to take that and i’m not even factoring the heat from the display or any other hardware like wifi, cellular radio, ram, flash memory, etc.