Quote:
Originally Posted by cycojesus
EDIT: read an hour, it went from 100% to 81%. Wifi off, luminosity 1%.
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I have two kobos, they don't have linear battery readings, also each device can with time change a bit their battery readings (even on new devices as Forma must be pretty new device).
You can try with some deep cycles (don't charge it till it goes almost empty). But, also, depending on device, there are sudden drops with battery percentage.
My H2O usually shows longer upper battery percentage, with sudden drops as it goes lower (below 40% I know I need to start charging, or I could found empty battery). My K1A is more even, but with few drops (10-15% is "lost"), first is around 55%, next about 40%, after that it goes more or less "stable".
But, this is just battery percentage as number you see, not actual battery percentage, you have still more or less battery capacity (unless you don't*), e.g. on my K1A when I go deep cycle I can read for hours on 0% and I mean hours.
*It is possible that something goes really wrong with battery, that it really loses capacity. If you try deep cycles and see how long you can read, this is only real way to test actual capacity, battery percentage as shown is almost always wrong and serves just as an orientation idea.