A recent DH game I joined is heavier on the survival horror aspect and for that reason the GM is having our gear lose power with each use. He gave glowglobes a runtime of 1d3 Hours before a recharge and flashlights a time of 1+1d5 hours (but they have a smaller but longer area of illumantion) but need disposable power batteries, so cost more in the long run.
The thing is, what about items like Pict Recorders, Dataslates, Photo-Visors, Auspexes, red dot sights and so on. How long of a charge would these items have? How can we recharge them? Does anyone have ideas to make our use of them sparing, but not feel crippled about worrying to use them.