Something strange happened to my laptop's battery

A few weeks ago I got to the office and noticed something peculiar: my XPS’ battery had around 7 remaining hours of life, while until the week earlier I had never seen it above 3 hours.

This is the (very short) story of how I supercharged my laptop’s battery without even knowing how to.

A bit of background

Last month I flew to the most beautiful continent in the world with the idea of spending a whole week doing safaris in Tanzania’s national parks.

Suffice to say I wasn’t super excited about bringing my laptop with me, mainly because:

Eventually, I decided to leave the laptop at home, something I hadn’t done since a few years. Gone for a good week…

Once I got home, I noticed something interesting: the light that signals the battery level is low was blinking — “probably got drained over the week”, I thought.

Plugged in my charger, waited until the laptop was fully charged, then the miracle happened: since then, the battery life has been extended by ¾ hours at least (you might think that’s not crazy, but for a battery that used to give me ¾ hours of love at most, being able to do 6/8 hours in a row is a blessing).

How did this happen?

Frankly, I do not know. I’ve always been a big believer of letting the battery work “at full capacity”, meaning that I let it drain as much as possible before charging it until it’s completely full.

I think this week-long draining session, without small charges in between, has allowed the battery to calibrate (?) better, or god-knows-what. Right now, being left with 20% of battery means I can still go on for a couple of hours:

All I know is that I have a better battery1, and I owe it to going on a vacation and being able to “disconnect”. Probably, the underlying lesson is that it’s good to disconnect once a year :)


  1. Critics will argue that the battery life should generally trend north of 8h (, but let’s be realistic…

Hi there! I recently wrote an ebook on web application security, currently sold on leanpub, the Amazon Kindle store and gumroad.

It contains 160+ pages of content dedicated to securing web applications and improving your security awareness when building web apps, with chapters ranging from explaining how to secure HTTP cookies with the right flags to understanding why it is important to consider joining a bug bounty program.

Feel free to skim through some of the free chapters published on this blog and, if the content seems interesting enough to you, grab a copy on leanpub, the Amazon Kindle store, gumroad or simply checkout right down below!

Buy the Web Application Security ebook for $9.99

In the mood for some more reading?

...or check the archives.