Ask HN: How to maximize battery life of my Smartphone?

This question keeps appearing within my group of friends, from my understanding there are 2 type of batteries in smartphones:

- LiPo - LiIon

And there are various theories about phone charge/discharge to keep battery healthy:

- Recharge when it goes down to 40% but stop at 80% (I use this technique for my laptop) - Reach battery minimum (~10%) and fully recharge - Keep the phone plugged whenever you can (battery topped as much as possible) - Keep the battery as close as possible to 60% all time (recharge when it's lower, stop charging when it's higher) - Keep the battery unplugged and fully charged all time (laptops only)

What's the right way to deal with battery cycles of my smartphone? Bonus points for laptops suggestions too.