In addition to their internal battery packs Adaptador AC for ETX-PE, LXD, LT, LS, LX90, LX200 (up to 14"), LX400,LX600, LX850, MaxMount may be powered from standard 115v. AC home electricity with the AC Adapter. The adapter plugs into any standard home outlet and includes a 25 ft. cord connecting to the telescope's control panel; input voltage to the telescope is 12v.DC. (12vDC 5A).
About ETX telesscopes it works with ETX90, 105 and 125, not for ETX-60, 70 or 80, neither for those ETX-90 manufactured in 2014 and after.