Nate,
Update your T3 firmware to 4.1.04 or higher. It should fix your battery issue. Im not sure about the heat though.
As far as replacing the battery it is a real pain in the butt. I’ve done it on mine and I do not recommend it.
This is not just when connected to CORS it is all of the time.
Nate is correct also in the fact that each page can have a separate coordinate system. Our native format is WGS84 as can be seen when exporting a PDF file. The first page of the PDF shows what transformation is being applied...
Also the T3 can use GSM or CDMA internal modem and can use an external UHF antenna. The 1M can only use GSM internal modem and has a standard permanent uhf antenna (green stick).
Glad that worked out. Better to be right that fast and it’s great if you can be right and fast. 4000’ of road is a good days work when it’s got trees on both sides.
Just saw a Facebook post that Kevin Davis past away. Had not heard from him in quite a while. I just searched Facebook and found he had cancer and actually passed away a few months ago.