I used to treat my Windows 10 laptop like it was invincible. I would charge it when it was low, unplug it when it was full, and repeat. Battery care? That sounded like something only phone users worried about. Fast forward four years, and my laptop is now a glorified desktop, only powering on when plugged in, and dies the second I unplug it. Somewhere between the Google Chrome tabs and Word documents, I killed my battery, slowly and silently.  Many people don’t realise how much control they h...