A power management system for a power supply (43) providing power to electrical
equipment, such as a totally implantable prosthetic hearing implant (40).
The power supply (43) can comprise a first rechargeable battery and at least
one further rechargeable battery that each independently provide power to the implant
(40) through a switching means. The management system comprises a management
means for controlling the operation of the switching means to place the system
in a first state where the implant (40) can draw power from only the first
battery or at least in a further state where the implant (40) can draw power
from only said at least one further battery.
