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KS10 battery replacement

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The battery life on my 3 year old KS10 is finally in the unbearable range. It lasts about 7 hours with minimal amount of streaming.

I ordered replacement battery LIR7854 which seems to be a good match dimensionally. I opened the hearing aid and used a scalpel to trim off glue. I cut off the battery cable and eventually removed the entire battery housing. Instead of fitting the battery inside the housing I simply attached the battery using adhesive foam and then soldered the terminals. The bare wires were insulated using silicone glue. The hearing aid is back in working state. It remains to be seen how long the battery lasts, but it’s hard to imagine anything worse than before.

The hardest part is definitely removing the old battery housing and pulling out the wires. Soldering small wires like this required a microscope and steady hands.

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Yeah definitely a mission and not for the faint hearted! At least they are working :wink:

You are definitely a genius! Having a powerful microscope to view and repair. There are a lot of mobile phones service center in Asia who would love to repair or change battery. The good ones normally have a microscope; they can get it done for a small fee.

Hi @yoyomin , thanks for the inspiration! i appreciate your post and you’ve inspired me to do this on mine. i have a few questions if you happen to remember.

you mentioned that you cut off the battery cable. did you cut it off from the point just outside the battery housing? or did you salvage some of it that was underneath the plastic housing? i’m looking at mine and i feel like the length of wire that is left would be shorter than what is in your picture. so i’m wondering if you had to solder some additional length?

ty :slight_smile:

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