I'm assuming that, like the OEM Davis WL-IP data-logger, that *IF* the Console is being powered by the #6625 AC adapter that the internal 3xC-cell batteries are not truly necessary and could be eliminated. Yes? No? Maybe?
Yes WiFiLogger is working like any other data logger. If you have AC adapter plugged that is a main power supply, If you pull out AC adapter then start to work using battery power.
Problem is bigger current consumption. It is bigger than USB/RS232 data logger and equal to IP Logger.
Console without any data logger can work on batteries 1 year.
Console with RS232/USB data logger can work about 3 months.
Console with WiFiLogger/IP Logger can wotk using batteries 3-4 days.
But I have add option to switch WiFiLogger to external power. If you add second ac adapter for WiFiLogger or you manage to split original AC adapter cable. Then batteries will be not used with WiFi chip.
However, the console is still equipped with the ability to write archived data. So even if you switch WiFiLogger to external power source life on batteries should be about 3 month just like RS232/USB data logger.
Logic is simple. If you don't have power at home, your router don't have power as well. No internet, no reason to drain batteries.
Original IP Logger also should have that option, becouse it's loosing data.
When you have a storm and you pull out AC adapter and you will forget to plug in. Then after 3 days batteries are dead, and no power.
Common issue with IP Logger.
I give you this option with external power source to prevent this situation. You choose, very convinient internal power supply from console, or external with second adapter, or splited cable.
+ There will be an option to automaticly shut down WiFi chip to save batteries, that option should be good for solar panels.
I am using DC UPS made by myself from old laptop Li-Ion cells. Not perfect but cheap and works fine. I will make some documentation and start separate post with this solution.
"How to buy 3 item from china and make yourself DC UPS for Davis weather station"