Power And Batteries; Battery Specifications; Installing Batteries - HP 10BII Owner's Manual

Power and Batteries
The calculator is powered by two 3-volt lithium button-cell
batteries.
When changing batteries, use only fresh button-cell batteries.
Both batteries must be changed at the same time.
Do not use rechargeable batteries.
Low Power Annunciator
When the low battery-power annunciator (C) comes on, you
should replace the batteries as soon as possible. If the battery
annunciator is on and the display dims, you may lose data. The
All Clear message is displayed if data is lost due to low power.
Battery Specifications
Your HP calculator requires two fresh CR2032 lithium batteries.
Installing Batteries
2. Make sure the calculator is off. Note that you will lose the contents
of memory when changing the batteries, so write down any data that
you have stored and need for later use.
3. Turn the calculator over and prise off the battery cover.
E а
Accessing the battery compartment
A: Assistance, Batteries, and Service 119