Dropped this into my Deluxe transmitter and it clicked right in without any fuss. The 7.2V 400mA rating matches the original exactly, and the collar's been holding a charge through full days in the field again.
Wasn't sure a 7.2V 400mA replacement would hold up like the original, but it's been flawless on long training sessions. The install video made the swap quick, maybe ten minutes total.