Repeaters with battery backup

[Rxich]

for zigbee, use an xbee S2C and one of these

DIY- Battery Backup Hubitat- under TEN bucks-NO soldering

EDIT 03/2022- There have been multiple reports of this same board being redesigned , such that there is now a momentary drop of power when switching from wall power to battery, rendering it useless as a UPS. My original boards are working fine 2+ years later, but that original board revision might not be obtainable. And like everything else, the price of lithium cells has skyrocketed(from 4-> ~9$) Essentially killing my initial sub 10 dollar solution. Using hubitat as my security system, I n…