Both SVR-2 and UPS-1 prevent power loss from transients or total power failure.
Two Inexpensive Power Backup Supplies AuthorsJohn CarsonPublicationSyntaxPub DetailsSyntax/Syntax ZX80 v4 n7Volume: 4 Issue: 7DateJuly 1983Pages7Read the articleSee all articles from Syntax/Syntax ZX80 v4 n7 Both SVR-2 and UPS-1 prevent power loss from transients or total power failure. TagsSyntax 1983 Hardware review John B. Carson Jr