crwdns2915892:0crwdne2915892:0
After about a year of intensive usage, I noticed the battery was swollen. I don't know whether it was caused by lying on it, storing it where it was bumped by other stuff, or just bad luck, but I figured this was repairable.
crwdns2942213:0crwdne2942213:0
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Just like when charging the device, take out the Bluetooth module from the headband and disconnect it from the speakers.
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The back cover is glued in place. It's not a very tough glue, so the cover may have already shifted a bit from its place, and it shouldn't be too hard to remove.
I'm opening an ASL06 (ASL06_H0 marking on the PCB) from some time before year 2020. It only has a 175mAh battery :O
Full marking:
5PB0E322826
175 mAh 3.7V
0.6475Wh 1708 -
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The module has two compartments, one for the battery and one for the circuit board. Remove both from their rubbery shell.
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You may be able to cleanly remove the two wires from the beige clip, but I wasn't confident I would be able to reconnect them, so I cut them near the battery, so I had plenty of wire to attach the new battery to.
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The original battery is a prismatic LiPo 3.7 V 330mAh with dimensions 4x28x26 mm
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I wasn't able to find one of that exact size, but since it fit even in its swollen state, I figured I could go for a thicker 6x28x23 mm battery
I ended up selecting ICP602823PA-01 as well.
Looking at Distrelec, they only had Renata LiPos. Here are the ones filtered for width<=29, length<=28 from https://media.distrelec.com/Web/Download...Cell_Model_______Part_No._Thickness_Width__Length_Typical_Capacity_(mAh)ICP241019________100290___2.40______11.20__19.30___25ICP341018PM______100730___3.70______10.20__19.50___35ICP331319PM______100735___3.75______12.60__20.30___50ICP501022UPM_____100640___5.50______10.00__24.00___80ICP641414PE______100694___6.70______14.90__16.80___95ICP501421PS______100690___5.20______14.10__22.50___115ICP651321PA-01___100696___7.00______13.20__23.50___120ICP521522PS*_____100935___5.70______15.50__23.50___135ICP581323PA-01___100692___6.20______13.20__25.00___145ICP402025PC-01___100644___4.30______20.50__27.50___155ICP641620PA-01___100695___6.90______16.20__21.50___165ICP602823PA-01___100697___6.40______28.20__25.50___350It turned out that on both of the two devices I was looking at, both had problems with loose contact in the beige battery cable connector. The battery on my newer device was still fine, I just had to carefully swap the leads between the connector, so that I had one with two functioning leads and one with two loose/nonworking leads.
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Solder or twist together the old and new battery wires
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Cover the exposed parts with electrical tape
I prefer to use heat shrink tubing for this as it does not have the risk of starting to unwind.
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You can test your repairs without replacing everything into its protective cover first. This can save you some frustration when it doesn't work on the first try, but requires a bit more caution when handling the circuit board.
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Long press the central button on the circuit board to turn it on. Does the red LED blink on?
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Does it connect to your device?
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Attach the speakers and try to play some audio
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Attach a charger. Does the charging light come on?
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You can look at the opening for the USB port to check the orientation (this is one place where USB-C would be a disadvantage)
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It might take some patience to guide the wires through the opening between the two compartments. In my case it was easier to turn the battery sideways.
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In my case, it remained sticky enough to not require new glue, even after several disassemblies.
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crwdns2935221:0crwdne2935221:0
crwdns2935229:02crwdne2935229:0
crwdns2947412:02crwdne2947412:0
I ended up removing the bad battery connector altogether from the battery wires. Then I soldered the negative side to the capacitor just below the connector on the board, and the positive side to the positive pin in the board connector. Finally I managed to get some glue gun glue on it.
Do you have a link to the supplier of the replacment battery?
