Battery taking too long to charge

I purchased 2 wyze cam outdoor. I started charging the batteries using the included USB charging cord plugged into a wall outlet. The red indicator lights are still slow blinking after 10 hrs of charging. Waiting for a solid red light but is still a blinking red light. How long does initial charging take?

I would think about 4 hours. I charge mine when they get to 40% and it takes 1 hour 40 min from 40% to 100 %. Pull out the power cord, open the app and see what percent of a charge it says the cam has. If you haven’t been able to set up the cams yet I guess that won’t work? Of course it could be either bad batteries or bad power adapters? Have you tried charging using the base to charge?

Information here says 4 Hours from 0% to 100%