That is also correct :) But as you said yourself it isn't easy... As far as I have found out there is no solution og work-around based on software only :( I have had problems with reboots myself but solved the problem by filling up the memory with...
Best batterylife you will get on this device is with WM. Find the right release (some of them have improved power management) and stick to it! You will NOT be able to find better battery-life with Android or WP...
Honestly? The end user will probably not notice the difference between the two ;) The only thing that matters is how well the previous owner has taken care of the device!
If you still have doubts then ask yourself 2 things:
1. Are you going...
Might be a stupid question but have you tried another battery? :) Could be one of the cells that has collapsed (happens very fast) and renders your battery unusable...
No worries about your english - understand perfectly ;-)
You are right about the battery app from the marketplace only shows the voltage and percentage remaining. Its nice for your startpage but other than that not that usable.