a little OFF TOPIC - But.... This got me thinking. Can I power a 12V Motor, say a 3500# winch for a hoist, with a 20v Dewalt battery ?
A
Quick search says NO.
" Dont overlook the basics of Ohm’s Law for motors with equivalent load resistance and power for no load + load. I doubt you measured the DCR (DC Resistance) of the coil to see if that did not exceed the OCP limit of the supply.
Consider ; Is motor DCR < V²/Pd=20²/90=4.4 ohms? Then the supply will fault out and shutdown.
The rule of thumb is the voltage source should be capable of supplying Vbat/DCR without blowing a fuse and >10% of Vbat/DCR at rated load and max current about 1% V drop desired and 10% V drop tolerated.
These simple equations and winch milliohm DCR test measurement will tell you must have at least a motorcycle battery and probably a car battery at 12V+- 20% and never 20V @4.5A.
Nope --- not even close "
To run a motor/winch, you will need a traditional jump pack or at least a MC battery