Power and batteries, Low power annunciator, Battery specifications – HP 10B User Manual
Page 121: Noise declaration
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Noise Declaration.
In (he operator position under normal operation
(per ISO 7779); LpA < 70dB.
Power and Batteries
The calculator is powered by three button cell batteries. Expected battery
life depends on how (he calculator is used and (he chemical content of the
battery.
Use only fresh button-cell batteries. Do not use rechargeable batteries.
Low Power Annunciator
When the low buttery annunciator (<CZD) comes on, you should replace
(he batteries as soon us possible.
If the battery annunciator is on and the display dims, you may lose data.
The ALL CLr message is displayed if data is lost due to low power.
Battery Specifications
Yotir HP calculator requires three l .5-vol(. button-cell batteries. We
rccoinincnd using either alkaline or silver-oxide type baltciics.
Do not use
rechor^cohlc hnuerws.
Use batteries from the following list, or use another
manufacturer's equivalent.
Alkaline
Panasonic LR44
Eve ready A 76
Duraceli LR44
Varia VI3GA
Kodak KA76
Silver Oxide
Panasonic SR44W or SP357
Evcrcady 357
RAY-O^VAC 357
Varia V357
Toshiba LR44
118 A: AssUtanc#, Batterlos, and Sorvico