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Note 3: My battery calibration history, for your reference
I am recording my battery calibration history here, it may be helpful to give a reference for those who are interested.
Note: I only do the calibration every 2-3 months, i do 30-85 rule between calibrations (plug in at ~30%, charge to ~85%).
The calibration starts with charging to 100%, then draining to less than 10%, followed by another charge to 100%. During calibration, I usually play an hr or two of video, and use the phone regularly, mostly web, txt, email, etc. I attempted to use dark theme apps when possible, and use dark reading mode in browsers when possible.
I turned off data when not in use, and turned off background sync.
My first calibration (Oct 2013) lasted 35 hrs, with 483 min (8hr 3min) screen on time.
My second calibration (Dec 2013) lasted 48 hrs, with 433 min (7hr 13min) screen on time.
My third calibration (Mar 2014) lasted 45.5 hrs, with 487 (8hr 17min) min screen on time. This is first calibration since kitkat, it seems kitkat has improved standby battery consumption (used to be 0.3-0.5% /hr, now its 0.2-0.25%/hr).
My fourth calibration (Aug 2014) lasted 39 hrs, with 432 (7hr 12min) screen on time.
My fifth calibration (Jan 2015) lasted 27 hrs, with 376 (6hr 16min) screen on time. This is the last calibration on this battery as it has lost 15-20% capacity.
UPDATE, after Lollipop update: Another calibration (Apr 15-16), lasted 33 hrs, with 455 min (7hr 35min) screen on time. Removing battery improvement from Lollipop (10% increase), SOT would be 6.75hrs, a 15% reduction from original capacity after 18 months.
Mar 2014 (two glitches, 1. 2 hr video at beginning wasn't counted in screen on by the system, not sure why; 2. mobile cell was on all the time, not sure why system didn't show any color there):
The battery seems to have lost substantial percentage of capacity (15-25%) over 14 months period. I will now switch to the battery I purchased from amazon, and keep this old battery as a back up.
UPDATE: After months of using backup battery, I did another calibration on this old one, results are below:
Sorry I can't post more than one screenshot for this calibration in this post due to 15 attachments limit, scroll down for all screenshots associated with this calibration.
In comparison, my backup battery, after lollipop upgrade, improved screen on time by 10%. Removing this improvement from OS, above SOT of 7.5 hr will become 7.580.9=6.75hrs. This is a 15% reduction from original capacity. This is not bad after 18 months.