It'll go 3-12 months depending on usage, but if you've got a wired doorbell already and hook it up it uses that for power (the 12-18v that normal lights up a do

It'll go 3-12 months depending on usage, but if you've got a wired doorbell already and hook it up it uses that for power (the 12-18v that normal lights up a doorbel) and you never need to charge it.