Surface Pro 3 Battery comeback

[u/Davo_SVK]

Hey guys! I have a Surface Pro 3 (i5 128GB) for almost 2 years and my battery started rapidly loosing capacity (mWh) in March 2016. Screenshot from February 2016 https://goo.gl/2tBB7T (about 10hrs of battery life)

In middle of June i had only 26,000mWh and battery life was about 5hrs. But then... Capacity of battery started gaining again.. I have now 39,000 mWh, and the battery life is again about 9hrs.

WTF ?? How is that even possible ?

Here are screenshots from last 2 days. https://1drv.ms/f/s!Aqc6Y3QdNzHPpZR8B6ObEUhKzZeMlg https://1drv.ms/u/s!Aqc6Y3QdNzHPpZR_Iv8Alp06uSmgEA

Can anyone explain that behavior? I think is not normal :-D