Thank you Eagle Eye. Going to buy that EV-Peak
Until that arrives, I would suggest the following... do not re-charge your batteries immediately, as you are currently doing. Fly them down to a voltage on the ST-16 of 14.6V. After you get back home, they will have bounced back to a no-load voltage of around 15.2V (+/- 0.1V). Charge back up to full the night before flying again.