Preventive Maintenance - HP 330 Service Handbook

Preventive Maintenance
The real-time clock contains a lithium battery which should be replaced
once a year. The real-time clock is located on the system interface board.
Although the battery is available from Hewlett-Packard, it usually can
be obtained locally. It is a 3V, 160 mAh battery.
Make Part
Number
Panasonic BR2325
WARNING
Battery may explode if mistreated. Do not
recharge, disassemble or dispose of in fire.
When changing the battery, remember that the real-time clock will reset
to its default state, and it is necessary to set it to the current time. Note
also that the battery retainer clip is a conductor, and merely lifting it
up without changing the battery will still cause the real-time clock to
reset.
22 Environmental/Installation/PM