I agree. The LED will probably be the most current draining component on the board, while it's on.
Any wireless stuff will have greater battery life with LED's disabled completely.
Another road soon to be destroyed by the council's...
They've only just finished buggering up The Cresent (A6) now Deansgate (A56).
Deansgate will be closed to vehicles on a 6 month trail basis.
Getting around Manchester city centre for engineers/deliveries/services will be fun.