Eh.

I spend enough money on my gear that I'm not too worried about the power supply (battery) or the gadget itself (whatever it may be) failing. If something quits, I have spares for the important stuff (flashlights, for example).

Really, we have some wonderful new tools here in the 21st century. And if you avoid the cheap stuff, there's no reason to expect high tech gear to be any less reliable than the old school equivalent.