Renogy 500A Battery Monitor with Shunt/Sampler (Coulomb meter) Sportage With scaling for presetting the

With scaling for presetting the width apart from the workpiece

including bag

might be just the thing for you

carving bread etc

Renogy 500A Battery Monitor with Shunt/Sampler (Coulomb meter) Sportage With scaling for presetting theCompatible with various types of battery: Lead Acid,Lithium Iron Phosphate, Lithium ion, Nickel metal hybrid High precision current detection High and Low Voltage Programmable Alarm Backlight and voltage value will flash simultaneously Data Storage Designed to automatically store the last testing data when system shuts off Displays multiple electronic parameters (Voltage, Current, Consumed Power and Battery Capacity) Universal Battery Monitor Voltage