How do you know it's not the cable? I ask because every issue I've ever had with AA connections has been a cable issue. I've had cables that worked for a while, and then just didn't. I've tried more expensive cables that still didn't work. But eventually I found one that works, and no issues since. https://www.amazon.com/Magnetic-Charging-Cable-MAGNITTO-Compatible/dp/B07SNVQSV7