Li-Po battery study
Interesting write up on the best way to charge Li-Po batteries. Scroll down to "What the user can do" if you want to skip the science bit. Basically running till empty is the WRONG thing to do according to this study..
Another interesting thing mentioned is how charging rate affects battery health. The faster the charge the more stress on the battery. Could the slow charge rate of the Z2 be Sony cleverly trying to lengthen our battery health? Maybe!
Sony W810i - One of the best phones ever. Sony X1 - Terrible, threw it away. Palm Pre - Nice OS, poor hardware. Samsung Galaxy S - Sweet! Pity about the lag. Samsung Galaxy Nexus - Really great! Nexus 7 3G - My hero! Samsung Ativ S - Incredible battery life! Nokia 1020 - Camera is immense.