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>Radio in my pack, speaker-mic on my shoulder
>GPS on the bars
>Contour on my helmet
>Charger with spare batts in my pack
>Phone in airplane mode in my pack
>PLB strapped on the outside of my pack
>Avalanche beacon on me in the winter
Phone's a few years old, but still holds good charge.
GPS, point-and-shoot camera, and my flashlight all run on 2xAA batteries.
Beacon's batteries get checked every pre-ride, and I don't let them get much below 75%. Batteries are cheap. PLB's is internal.
I have a few batteries for my radio, the high-cap packs last a solid two days of use. Weekend or 3-day rides I don't even bring the charger.