HP · Calculators

HP 17bii+ battery

2 × 3V lithium coin cell

How to replace it

Follow the manufacturer steps in the sources below.

Last checked 7 October 2026

HP 17bii+ uses 2 × CR2032.

Buy links go to Amazon (Associates where tagged) or other affiliate programmes when available. They never change the battery answer.

Optional tools for opening, testing or charging — separate from the battery answer.

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Fluke 101 Digital Multimeter
Accurate open-circuit voltage and basic electrical checks
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Klein Tools MM400 Multimeter
General DC voltage checks including battery terminals
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Digital multimeter
Measure open-circuit voltage and general electronics checks
Voltage alone does not establish usable capacity, especially for rechargeables.
Tester vs multimeter Buy on Amazon

Buy links are optional and separate from the battery answer.

A fresh 2 × CR2032 should restore HP 17bii+ if the battery was the problem. Work through the checks below before replacing the device.

Check the battery type
This device needs 2 × CR2032 (lithium). Rechargeable cells are not supported for this device. Same size does not always mean the same battery.
Check known model-specific issues
Do not confuse with older 17bii which used 3× LR44 per HP specs
Confirm the battery itself
For most coin cells, fitting a known-good fresh cell of the correct code is simpler than capacity testing.
Still not responding?
If a correct, fresh battery installed properly does not restore the device, the fault may be elsewhere — the device may need service or replacement.

These checks follow this device’s orientation, battery type, and important notes from the maker.