I normally charge to 80%, after a couple of weeks, I charged to 100%.
This TED graph shows the charger tapering off as it reaches 100%. Notice the erratic power swings as the charge tapers off. The next day I charged to 100% again
Here is the TED graph. Notice that it’s smoother and takes longer to taper down. The graph on the
third day is even longer and smoother. I believe this is because charging to 100% gives the battery management system a chance to equalize the cells at their peak voltage, so the subsequent charges to 100 are longer and smoother because cell are charging more evenly and the BMS doesn’t need to shut down the charger to protect some cells for overcharging while others are still low. This is all speculation on my part but I think it’s probably a good idea to charge to 100% once in a while to keep the cells equalized.