I really like the Panel mount volt-meter (ID: 575) and amp-meter (ID: 574).
They were easy to mount, easy to modify and at a good price.
I wanted the volt-meter to measure voltages below 4.5-v so I powered it (and the amp-meter) from a separate 6-v battery and un-soldered one side of R9 (see the excellent photo on the 575 product page).
A wire connected to R9 became the volt-meter's new input terminal.
I also changed the shunt in the amp-meter from a 10-a shunt (0.01-ohm) to a 1-a shunt (0.1-ohm) and removed the decimal point resistor. Now the amp-meter indicates in mA.
I also have plans to put the meters on a lead-acid battery bank. For this project I will again remove the 10-a shunt and connect the (thick) red/black wires to a external 100-a shunt. Not sure how to change the decimal point though.
These were perfect for my recent projects, Thanks.
BTW it is worth repeating to users, the black, negative leads also connect to your external circuits.
You may not be able to connect these meters the same way you can connect a handheld multi-meter.