I re-read my Ryobi manual and it says that if your power tool of choice stops working while your using it, you release the trigger and that will re-set the battery IF it still has a charge.

This makes me think that it might not be something that only the charger can re-set, unless the tool battery holder/trigger is set up like the charger?

Since you have your fish finder set-up made, did you try running it jerry rigged at home and when it dies, just turning the fish finder on/off to see if that would re-set the battery?

I hope our electrical guru MP chimes in, if anyone would know, it would be him.

Quentin didn't have a problem, so maybe it's exclusive to the Rigid battery, or else his Ryobi battery doesn't have that feature.

Now I'm really curious. :-?