Success HK posted that a new accessory for the Gameboy Micro has been released:
Product Features of Mega Rechargeable Battery Pack
Can be charged quickly
Long lasting
3.8V 600mAh
Screw driver included
More Description of Mega Rechargeable Battery Pack
Long life lithium rechargeable battery pack for long time supply power to asist you triumph in GBM games. It can power your GBM over 8-hour at normal condition.