What type of batteries should I buy for my Honeywell Doorbell?

It is advisable to use good quality alkaline type batteries, because this type of battery has a more stable voltage, and lasts longer than the lower cost zinc-carbon type.

Rechargeable batteries (NiCd or NiMh) are not suitable because they have a lower voltage, and the doorbell circuitry will not operate reliably at the low voltage.