Is there any official response from Garmin on the obviously rampant problem of poor battery life of the Edge 130?
Garmin should have done this right, they should have put a bigger battery in, BUT... They could also mitigate some of the damage. They could satisfy a lot of us by offering a twist-on battery pack that in turn clips into the Garmin mount. I know they have it for other models. Yeah, it would need a short cord to work, but I could live with that. I'd be willing to spend another $40 for an external battery for the real cold days and to use the back-light more during night rides.
Garmin is disappointing, can't argue that. They host these forums to glean what they can about customer sentiment to steer new model introductions, but don't step in with any solutions to problems with existing units. The most we can hope for is perhaps this prompts some software upgrades that might not otherwise come. Maybe someday my elevation graph will work while following a course...
You could say Backlight = Backlight, whether the device is big or small.
However bigger devices have a bigger battery, so the impact of the backlight is smaller on bigger devices.
My Etrex has 2800mAh batteries, and has no problem with backlight.
The same Etrex lasted 28h(!) outside in the freezing cold (GPS+Glonass and ANT enabled - bcklight off)