Hey, i got nothing against non-destructive. In fact, i considered to do my final mod non destructive also, but i like to have option of external charging NOT occupying USB port at the same time, to 4.23 V. Also, maybe You guys don't realize it, but using external charging like dr_frost proposed make Your N900 run using exclusive external power - You battery can even be placebo paper copy When cables are soldered somewhere BEFORE N900 pins, like most of us will do it (i prefer to solder next to cell, going around protecting PCB - i like protection , but this may prevent me from charging to 4.23V), N900 literally sucks power from charger + charger is also charging battery..

This is another feature we wanted so much next to hotswapping on high load - the only 1 drawback is that You cant do it with normal 5V charger, You must have one dedicated for Li-Ions. Carrying around massive RC charger might be not best idea, but modifying quasi-AA size Li-ION charger to charge our battery definitely IS both cheap and effective. You can not even merge it with car charger - i plan to do it just soldering cable and plug that i have lying around.

In fact, at this point You can stop carrying N900 stock charger, unless You modify it and use as lightweight, high-efficiency power source for powered Hub and HEN - like i did.