Power Supply Type; Backup Battery; Power Consumption - Pro-face GP4000 Series Replacement Manualbook

2.9.2 DC power supply type
The power connector on GP-4501T/TW (DC type) is a spring lock type.
If you replace GP-477RE (DC type) with GP-4501T/TW (DC type), change the
power cable.

2.10 Backup Battery

Unlike GP-477RE, GP-4501T/TW does not use rechargeable secondary batteries but
replaceable primary ones. (For both a rechargeable type and a replaceable one,
contents to be backed up are the same.)
When the time for replacement of backup batteries approaches, the message to urge
you to replace the battery, "RAAA053: Running out of power in the backup battery.
Please change the battery." appears. When the message appears, replace the battery
referring to the GP4000 series hardware manual.
Replaceable Battery Model
PFXZCBBT1

2.11 Power Consumption

The power consumption of GP-477RE is different from that of GP-4501T/TW.
GP-477RE
GP-4501T
GP-4501TW
For the detailed electric specifications, see the hardware manual.
AC Type
50VA or less (AC100V)
44VA or less (AC100V)
58VA or less (AC240V)
-
50W or less
17W or less
19/55
DC Type