A digitizer tablet computer has a host processor connected to a service processor which, in turn, is connected to a digitizer controller and to a power subsystem microcontroller. A battery supplies the primary power for operating the computer but the computer is also connectable to an external source...http://www.google.fr/patents/US5341503?utm_source=gb-gplus-shareBrevet US5341503 - Battery operated computer having improved battery gauge and system for measuring battery charge
Battery operated computer having improved battery gauge and system for ...