Question

dc volts 7.14 volts using resistors want to end up 5 volts or below but not lower than 3.7 volts

Answer 1

what are you talking about

Answer 2

Use a resistive voltage divider with the proper resistor ratio.
depending on your current/power requirements. One solution is two resistors connected in series, one a 5 KiloOhm, the other a 2.1 KiloOhm connected to your 7.14 volt source, would give you 5 volts across the 5 kilohm resistor. This is assuming low internal resistance of your source.