I own two Acer Chromebooks.
I own the Acer Chromebook 15 (CB515-1HT-P39B) and the Acer Chromebook 11 (CB311-8H-C5DV)
Both of these devices are less than a year old and the battery percentages are acting very strangely.
With the Chromebook 15, it started at over 99% and then after a single reboot it dropped all the way down to 91% and has stayed there every since with less than 20 cycles.
As for the Chromebook 11, it's even more odd - It also has around 25 cycles and is less than a year old and is now down to 76%.
I've never had any other laptop battery act this way. Is it possible the 'battery_test' is faulty? Or are the batteries in these devices just very low quality?
Let me know if you need any more information.