I read the manual, honest!

Anyone know the proper battery care for Edge 705?

I still have the rule of thumb from the NiCad days that for longest battery life you let it run down to almost nothing before you charged the battery.

Even now I've toasted laptop batteries by keeping them plugged in too much (my laptop now lasts about 2 minutes once unplugged -- usually use it as a desktop).

Many of the newer batteries do not require this, and the manual for my smartphone states that letting the battery run down is not beneficial and that you will actually get longer life out of the battery by keeping it as charged as possible at all times.