ONE SOLUTION -
I examined my Ionic case under high magnification and discovered that the bottom has a clear plastic lens covering the sensors. Over time, this lens layer has worn thin and actually cracked enough to allow water or sweat to infiltrate the bottom of the pebble.
This must have caused a short or damaged the sensors because every new battery I tried drained quickly.
I have put all of my parts (Screen, battery, Main board, shield, etc.) into a new case complete with sensor array and now I am seeing excellent battery life!
The new battery part is linked at the top of this page.
Here is the link: Fitbit Ionic Battery
The battery drains so quickly - just like the old battery that I am replacing.
It charges up to 100% but then loses about 1% every 5 minutes. Could there be a short circuit somewhere?
This was all sealed up by factory until I needed a new battery.
From iFixit.com - they are back in stock now.
This guide is very detailed and pretty accurate. Thank you for posting it!
Does anyone know how crucial the ‘Calibration’ procedure noted at the end article is?
I replaced my battery and it drains so quickly - during the course of a few hours.
But I didn’t try leaving it on the charger for 2 hours after 100% is reached. Trying that now.
Great guide but I think it should be renamed… It’s not a Pump that this guide talks about, it’s a Check Valve.