power bank for Wi-Fi router| Mini UPS for modem|4 hours backup

hi everyone how to make Mini UPS for Wi-Fi router| how to make power bank for internet modem| Mini UPS for ptcl Wi-Fi device| how to use Mini UPS| Wi-Fi router backup #Wi-Firouter #powerbankformodem #WiFi #MiniUPS #xl6009 #3.7vLithiumioncell