Scott, the battery you put in the computer I gave to Ruth is not taking a charge. Seems to stay at 2% even when charged for a longer period of time. Is there something that I could do to fix things?
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Let’s try this first: with the computer plugged in to the charger and the computer turned off: hold down the Shift+Option+Command+power button all at the same time. You should see the small light on the charger change colors. Green to Orange or Orange to Red. Then restart the computer.

Next shut the computer down and when you restart hold down the Command+Option+P+R all at the same time and continue to hold them down during start up. Ou will hear the computer chime. Continue to hold those keys down through 3 chimes then release. The computer will then restart completely.

Lastly, you’d want to make sure you are using the correct charger on the computer. Depending on the computer, some MacBooks charge via 45 watts, 65 watts, etc…. If the charger was underpowered it may not allow the battery to charge. So if the power adapter is the original it should be fine but if has been swapped at some point then that could also be the issue.

If neither of those solutions solve the issue for you, I would be happy to replace the battery at no cost. Keep in mind if we swap the battery and the problem persists, that would be strong evidence that the power adapter was the issue.