DROK Adjustable Voltage Regulator DC, Buck Boost Converter 6.0V-36V 9v 12v to DC 0.6-36V 24v 5A Power Supply Panel, Constant Current Volt Step Up Down Module

Yeah i had one before i used the batery its a 900watt amazon basics brand. I have 2 of them, one for my 3d printer, and one for my network. Now since its a lead cell it only lasts maybe 2-3 hours for the network 1 hour for the printer depending opn what im printing. Or yo can purchase this https://www.amazon.com/dp/B089ND7PTH?ref=ppx_yo2ov_dt_b_fed_asin_title and https://www.amazon.com/dp/B0DRY6JBM9?ref=ppx_yo2ov_dt_b_fed_asin_title and https://www.amazon.com/dp/B0GV2RRC2H?ref=ppx_yo2ov_dt_b_fed_asin_title and make it into what it should have been. much cheaper then Buying a UPS. and if you have a3d printer i have the 3mf files for the box i designed to set it all up in, reason you want that is because when it goes into battery mode the voltage goes from 12v 2.6smpd to 8,6v and 6amps sp you use that to deliver constant curent and voltage just like a ups.just hundreds cheaper.