hello and welcome to the forum Wvcoinminer , most manufacturers will state that the new machines of today have built in voltage regulators that keep the flow of current at a steady rate to operate the machine at a consistant level. i do know low battery power will make most machines opperate erratically ( false more , emi will affect it more , inconsistant vdi's or tones on targets , ect , ect) therefore affecting its capabilities . i see this behavior inboth my DFX and TDI sl when their batteries are about spent. so i guess if low battery power can affect the machine in such ways as this i don't see how it can't affect the depth in some manner.
Dan