We have had our W40Z (B218) pallet jack for about 8 years. The batteries were replaced 4 years ago and until now we haven't had any issues.

All of a sudden the charger stopped working. Instead of going into the charger sequence as per usual, the green CHARGED light flashes ~15 times followed by the red DETECTION and POWERED lights flashing once simultaneously. The sequence then repeats itself. We've cleaned and checked all the cables and terminals. Our battery tester reads "LO" on each battery. Jack moves and lifts normally.

We thought to check the fuses in the charger, but neither of us has much electrical experience and don't want to open it up if we can avoid it. Any suggestions short of calling in a tech?

Thank you,

Jay Mack