How long will batteries last in the SK626 siren?

Batteries are intended for backup use only in the SK626. You should power the SK626 with the included AC adaptor at all times.

If you use rechargeable batteries, the SK626 will charge the rechargeable batteries while plugged in, to ensure they are always fully charged. In this case, remember to slide the battery selector switch (located at the bottom of the unit) to RECHARGE

We do not recommend to use battery alone to power up the unit. It would last for 2 weeks max.