i wonder if it would just charge if you went for a jog or something with it on your arm - i guess it would.... sooo the new n800 fitness plan....

step 1 - smash AC charger with hammer
step 2 - jog or you're battery dies

more likely than not though, there will be:
step 3 - sit in a corner and cry because you are too lazy to jog
step 4 - buy a new AC charger