HP 10bII - Power and Batteries; Battery Specifications; Installing Batteries

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
1.
Have
two
fresh
CR2032
batteries
at
hand.
Only
touch
the
batteries
by their edges. Wipe each battery
with a lint-free
cloth to remove
dirt and oil.
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