model working with openwrt BX750MI

apc ups

https://www.batteriesinaflash.com/battery-run-time-calculator

https://www.amazon.de/-/en/APC-Back-UPS-Uninterrupted-Protection/dp/B08G8WHYMH/ref=sr_1_2?crid=1758NJSR2COGO&keywords=BX750MI&qid=1661329713&s=computers&sprefix=bx750mi%2B%2Ccomputers%2C408&sr=1-2&th=1&psc=1