It's for a bird bath. I want it to run all day. I didn't want to have to plug it in to a wall outlet. Spent more than planned but I got a 12w power bank and it seems to be working. So far.More likely your powerbank doesn't like powering motors... If its 5000mAh it should run that motor for 5 hours (assuming its charged). But motors are finiky things, they take a lot of current to start and are electrically noisy, both of whch could upset the protection circuitry in the powerbank.
How long do you want the pump to run for?
by Jake Hertz
by Jake Hertz
by Duane Benson
by Robert Keim