I linked the charging board I used above: https://www.amazon.com/Kaisiking-Professional-Battery-Activation-Compatible/dp/B077M6R86P

Just in case that charging board was "playing it safe", I did connect 5V direct from a USB cable to different points on the connector with no luck. I peeled back the tape on the battery a little, but didn't want to risk bypassing the connector without any prior knowledge of what I was looking at.