Cyber power makes decent UPS’s. I have two of these.
CyberPower CP1000PFCLCD PFC Sinewave UPS System, 1000VA/600W, 10 Outlets, AVR, Mini-Tower https://www.amazon.ca/dp/B00429N192/ref=cm_sw_r_cp_api_i_Q-lFBbSKEDX3S
One for the router, NAS and modem (and eventually for the OSPi) and another for the tv and retro consoles (don’t want to lose my progress in games that don’t auto save). Works great. There’s enough juice in there to run a raspi for a really long time.