This charger compatible with ESR16, ESR505, BAYERSAN TROLLEYS AND TSR 35 TROLLEYS. It may
look different to what you have but it is compatible with above listed backpack sprayers and water fed pole trolleys.
IT IS NOT COMPATIBLE WITH BLUEMAN 20 AND GREENMAN 20
MODEL: C P1220
INPUT: 100-240VAC, 50/60HZ 1.5A
the charger is doing the job it is meant to do.