I have a Guest model 2623 on board battery charger on my 98 Jaguar. The water in the TM batteries only, seems to evaporate in less than a week. Is there anyway to check if it overcharging or not shutting off when it has reached full charge? Also, I notice that BC does not show that they carry “Guest” anymore but, has “CUL M RITE Pro Pak III” instead. Any feed back on this charger? Thank you!!!