Bunkermagnet
Journeyman Pro
Did you charge the new battery up before use, and if so did you notice the charger light showing it was charging?Yes leads attached. Trolley still works with old battery.
Have you checked the leads connected to the new battery are good? Sometimes when they crimp a terminal connector onto a lead they crimp onto the outer sheathing rather than the copper cable.
If the terminal crimping is correct, I would suggest the battery is no good, so it's "just" a case of contacting them and arranging a new one and yours sent back.