An external mains adapter can be used when using the Cambridge Z88 for long periods.
Since the Cambridge Z88 is a totally portable computer it is advisable to connect the external adapter in the order described below, or static electricity may cause a spurious reset.
The recommended procedure is as follows:
When disconnecting the adapter, unplug from the Cambridge Z88 before unplugging from the AC power socket.
Make sure the adapter is turned off after unplugging from the Cambridge Z88.