dunno if this has been covered before, but i just noticed something today when fooling around my w/new zz (Porsche - stock, unmodded)...
1. place on charger
2. charge
3. run - runtime a couple minutes
4. place on charger
5. charge
6. remove from charger
7. wait a sec...
8. charge again
9. run - runtime about doubled!?!?!!!!
has anyone noticed that you can double-charge the zz for more runtime?