You can charge the Jtip from the LS USB port.I found a 1/2" rebar (1ft in the ground), that was about 3" from a water valve (cast metal casing). The schenstedt wouldn't pick it up.
I still keep my schenstedt in the truck in case the battery goes down on my J Tip.
Yes.... If ya haven't lost the charge wire! (I just bought 2, so one stays in office, and one in field!)You can charge the Jtip from the LS USB port.