Replacing The Battery - HP Pagewriter XLi M1700A Operating Manual

Battery life varies by how the battery is maintained
and how much it is used. If the battery has been fully
charged and requires recharging after
a
few ECGs,
consider replacing it. Use only lead-acid batteries with
HP part number M1721A.
Figure 7-3. Replacing the Battery.
A.
Battery Door
B. Thumbscrews
Maintaining the Cardiograph 7-7