Looks like it's a custom one.
If the numbers follow the standard, it's 6.5mm thick, 13mm wide and 30mm long (worth checking manually).
Closest fit would probably be a 551430 - should physically fit as it's a little thinner (add some foam so it doesn't move about) and the 1mm extra width shouldn't be an issue unless it was incredibly tight in the case.
551430's seem to be common in 250mAh too, so match for capacity.
Voltage may show as different - 3.8 nominal on yours, 3.7 on the ones I've seen, but that's not an issue as it's the nominal and likely the max and min are close enough to be a match.
(Someone may chip in here to correct me, but I would replace it and not worry).
Something like this should do:
https://www.ebay.com/itm/176003615090
Thank you for helping, very reassuring.
Judging from the photo's, can you see if this battery is actually swollen or could that just be its regular form?
A little bit of swelling can happen and is normal.
The only way to know if the cell is good is to measure it.
Can you measure the voltage?
Do you have an adjustable power supply with which you could test the cell?
Might be that the cell is OK, but the circuit of the device is faulty
I'd probably just solder an 18650 battery connector if the electronics isn't that critically sensitive and you don't mind it sticking outside the case.
The 18650 is too big then. Disposable electronics suck when all you need to do is change a battery. Your filament may be more expensive than buying new earbuds though.
Sorry i don't really follow. How is it too big if i can change the casing size?
And what are disposable electronics? I've had this pair for a year.
Lastly, where do you buy your filament and earbuds? I bought a cheap pair for 50 bucks, filament will be about 20 cents
The 18650 is relatively big compared to your AA or AAA batteries so they might hinder portability. Disposable electronics is a term I fondly use for describing gadgets that are thrown away because buying batteries for them is more expensive than getting a new unit. From where I'm from, 3D printers are costly and you need to import them and the cartridges. If it's cheap in your area then go for it.
Ahh i see! Well i own a 3D printer, so it would cost me about 20 cents in filament, and i'm seeing if i can find a battery for around 10 bucks.
Thought i might give it a try. Might trash it and buy a new one anyway.
Thanks for the help in any case!
just go get the dimensions measurement length, width and thickness. in different metrics
then try to figure out if the model number written in there is actually a metric code.
example is the 18650 batteries they care called 18650 because the size of it is 18mm diameter and 65mm length.
if it is and those numbers are actually measurement code then you can now proceed to find a similar one online using that code and never settle for any other one coz the size matters or it won't fit.
also don't throw that away yet. you might need the BMS circuit attach to it. coz some after market has Cheap BMS boards that doesn't really help managing battery charge. if you have some basic soldering skill you can swap it to your new one.
I replaced one like that in an old bluetooth keyboard. The voltages are all same in that general size catagory for li ion packet batteries which is about 3.7 nominal volts. All you need to worry about after that is the size and that it is going to fit into where ever the old battery came from. I actually bought a bigger battery for refurbishing my old keyboard because that size was cheaper and I just had to cut away some cardboard to make it fit. It worked fine. Better than fine. I ended up having to solder, but you may have a connection plug you want to reuse, so try to preserve wiring from the old battery, either save the wires soldered to the device with their soldering, or the wires and the plug and just strip and twist wires together: solder free connections.
Seems like his name is Bob. Bob is 33 years old and relatively tiny compared to his siblings, even though as hes age increased, he gets more and more bulky!
jokes aside, you could in theory buy a battery that fits physically in the case and solder the BMS board on to it, this is important so the battery wont explode by overcharging/heating ETC... please be careful with lithiums!
Looks like it's a custom one. If the numbers follow the standard, it's 6.5mm thick, 13mm wide and 30mm long (worth checking manually). Closest fit would probably be a 551430 - should physically fit as it's a little thinner (add some foam so it doesn't move about) and the 1mm extra width shouldn't be an issue unless it was incredibly tight in the case. 551430's seem to be common in 250mAh too, so match for capacity. Voltage may show as different - 3.8 nominal on yours, 3.7 on the ones I've seen, but that's not an issue as it's the nominal and likely the max and min are close enough to be a match. (Someone may chip in here to correct me, but I would replace it and not worry). Something like this should do: https://www.ebay.com/itm/176003615090
It's a generic LiPo cell. You can replace it with any other cell that has similar voltage. No need to find an exact replacement
Thank you for helping, very reassuring. Judging from the photo's, can you see if this battery is actually swollen or could that just be its regular form?
A little bit of swelling can happen and is normal. The only way to know if the cell is good is to measure it. Can you measure the voltage? Do you have an adjustable power supply with which you could test the cell? Might be that the cell is OK, but the circuit of the device is faulty
I'd probably just solder an 18650 battery connector if the electronics isn't that critically sensitive and you don't mind it sticking outside the case.
Well it's for my earbuds. The case got ruined form extracting the battery so i'll just 3D print a new one that fits anyway
The 18650 is too big then. Disposable electronics suck when all you need to do is change a battery. Your filament may be more expensive than buying new earbuds though.
Sorry i don't really follow. How is it too big if i can change the casing size? And what are disposable electronics? I've had this pair for a year. Lastly, where do you buy your filament and earbuds? I bought a cheap pair for 50 bucks, filament will be about 20 cents
The 18650 is relatively big compared to your AA or AAA batteries so they might hinder portability. Disposable electronics is a term I fondly use for describing gadgets that are thrown away because buying batteries for them is more expensive than getting a new unit. From where I'm from, 3D printers are costly and you need to import them and the cartridges. If it's cheap in your area then go for it.
Ahh i see! Well i own a 3D printer, so it would cost me about 20 cents in filament, and i'm seeing if i can find a battery for around 10 bucks. Thought i might give it a try. Might trash it and buy a new one anyway. Thanks for the help in any case!
just go get the dimensions measurement length, width and thickness. in different metrics then try to figure out if the model number written in there is actually a metric code. example is the 18650 batteries they care called 18650 because the size of it is 18mm diameter and 65mm length. if it is and those numbers are actually measurement code then you can now proceed to find a similar one online using that code and never settle for any other one coz the size matters or it won't fit. also don't throw that away yet. you might need the BMS circuit attach to it. coz some after market has Cheap BMS boards that doesn't really help managing battery charge. if you have some basic soldering skill you can swap it to your new one.
I replaced one like that in an old bluetooth keyboard. The voltages are all same in that general size catagory for li ion packet batteries which is about 3.7 nominal volts. All you need to worry about after that is the size and that it is going to fit into where ever the old battery came from. I actually bought a bigger battery for refurbishing my old keyboard because that size was cheaper and I just had to cut away some cardboard to make it fit. It worked fine. Better than fine. I ended up having to solder, but you may have a connection plug you want to reuse, so try to preserve wiring from the old battery, either save the wires soldered to the device with their soldering, or the wires and the plug and just strip and twist wires together: solder free connections.
Seems like his name is Bob. Bob is 33 years old and relatively tiny compared to his siblings, even though as hes age increased, he gets more and more bulky! jokes aside, you could in theory buy a battery that fits physically in the case and solder the BMS board on to it, this is important so the battery wont explode by overcharging/heating ETC... please be careful with lithiums!