+1 - me too
From post #204 here: https://budgetlightforum.com/t/-/24621, the engineer/designer, Henry Xu replied to my questions and said this:
Tom: The charger will charge each cell to 4.20v before terminate the charging processing. Our charger doesn’t supply trickle charge current, so when it stopped charging, the cell voltage will re-settle by itself, and after 12hours, cell voltage can be 4.16v display. So concerning volt meter accuracy issue, please do this: make a charge cycle, and after is shows full, you take out the battery and measure the battery voltage with a DMM. We have +/-0.05v tolerance ( internal control is +/-0.03v at 4.2v condition). There will be volt display variant due to internal voltage resister network components variance reason. With your case, displayed value of 4.18 for 4.2v is possible with this charger.