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The life of my battery between charges has been slowly going down, and now it only lasts a day or two. Does anyone have any experience replacing the battery in this device?
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Hi @susan44228
Here's the ifixit Kobo Aura HD Screen Replacement guide that will help you to gain access to the battery so it can be removed/replaced.
The battery is glued in place as can be seen in this video for a same brand, different model tablet. (go to 5:00 minutes → into the video to see what they did to remove it).
A better option is to get a syringe and fill it with Isopropyl Alcohol 99%+ (available from electronics parts stores) and run a line of alcohol along the edges of the battery to help soften the glue then gently prise the battery up a bit with a pry tool (examples only) and then add some more alcohol lifting the battery more each time etc, until it can finally be removed. Clean off any residual glue and then perhaps use appropriate thickness i.e. thin, double sided adhesive sheet or tape strips (you cut to size) to hold the new battery in place
Replacement batteries are available online. Just search for Kobo Aura HD battery to find suppliers that suit you best.
Remember try not to puncture the battery when removing it and to dispose of the old battery responsibly ;-)
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I have a Kobo Aura H2O that worked well as long as it was tethered to a charger.
I was unable to find an exact battery replacement but got one with smaller width and length and slightly more thickness for $15.
Using the "mandolin pic" from the Ifixit kit I removed the back cover. The old battery is glued to the compartment and the positive and negative leads are soldered to a pcb. Using one of the cards in the kit I removed the battery from the glue. I cut the leads from the pcb leaving enough to tell which was the red lead and which was the black lead. I cut off the new battery's connector and removed a small amount of insulation from each lead and melted a bit of solder on each lead. Starting with the black lead I replaced the cut leads with the new battery leads. After putting a tiny dab of glue under the new battery I verified it was firmly in place and snapped the back cover back in place.
The ereader charged to 100% and after 3hrs of reading shows 99%.
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