Balto
Established
I have 2 for my m9 and keep and extra 2 in my bag for my m6's meter. I don't often run out of power unless I'm out in the snow luckily, but I do forget to recharge about half the time so I like having an extra just in case.
If you use a Fuji x100 (possibly other Fuji models too) it's advisable to have a spare (or two). The battery indicator gauge is very 'non-linear', and shows a full battery up until just a few shots before exhaustion. When one grabs the x100 upon going out of the door, the indicator could be showing a full battery, but it could very well be just about to fail...😡 A spare can therefore save the day.
This a major flaw in an otherwise excellent camera.
Well, here's my dilemma - I want to go to Everest base Camp later this year...
Would love a first hand review on: http://www.voltaicsystems.com/
Well, here's my dilemma - I want to go to Everest base Camp later this year. ..., I wonder if I should just go film on this one anyway? ...
Definitely I would take a robust film camera as a backup. Or as the only camera. See my above story of how a dead battery ends your photography. Even if it's meter dies due to a cold battery, you can still guess exposures and shoot....if it's old enough to be a pure mechanical shutter.