The EXFO 90W AC Adapter (vendor part GP-2233A, Millennium part 525491) charges and runs FTB-1v2, FTB-2 and MAX-860/880/890 test platforms in the shop or on a splice trailer, keeping OTDR and metallic test sets powered through long troubleshooting sessions. It's built for version D and later units, so techs replacing a lost or failed charger should confirm unit version before ordering. Having a spare on the truck avoids a dead test set stalling a job. Order it alongside the matching carrying case for the same FTB-1v2/FTB-2 platform.