Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: How much battery life does the viewfinder burn?
Document: Not only that, but enough of that jiggling around could cause the lenses on today's plastic-lensed eyeglasses to become blemished. Personally, I am more comfortable using a viewfinder (which I use in my DSLR) and so purchased this Sony EVF just to make life easier. My view is that a photographic tool (what a camera is) should "disappear" as much as possible in the creative process.
Viewfinder works great and I find the fit much more snug than others have reported. Shame about the price. It can't cost that much to make. Price silly but performance excellent.
While the Rx1 is a superb tool, at times it is hard to hold steady with your arms extended. Using this EVF allows much better handling of the camera as you can brace it against your forehead, like you would most optical viewfinder based SLRs. I highly recommend this viewfinder for all Rx1 users.
It's terribly overpriced, as is the camera itself, but that's how much it costs, and there aren't many other options if you buy it new. And did I mention that for $450 bucks it's made entirely of plastic?
I bought this for my RX100 II, and although this $448 cost almost as much as the camera, it's worth it.My only gripe (besides the cost) is that the Sony Multi-Shoe interface has not catching or locking mechanism; it slides in and can easily slide out during transport.
This is my first EVF ever, so I don't really have much to go by in comparisons. This however is without a doubt an amazing EVF, this much I know, without having to sample others. It absolutely pops in bright light, although the eye cup probably helps shield some of the light, and is razor sharp in clarity.
I'll preface this by assuming that a majority of purchasers of the Sony cameras which accomodate this EVF are likely photography enthusiasts since there are plenty of (much) cheaper compact cameras out there. If an eyeglass-wearing photo enthusiast cares about composition then he/she needs to give some thought to the fact that this EVF, with either provided eyecup, will still not allow the user to see the complete frame that the camera will capture without jiggling the eyecup around after you have pressed the eyecup to your glasses.
I can't say that it's WORTH the money but I can say that the Sony is a good enough camera that it deserves this viewfinder and that once you get it you will most likely stop shooting without it.
This viewfinder prominently protrudes on top of the otherwise small RX1. With this viewfinder, the RX1 just doesn't look as sleek. The viewfinder is made entirely of plastic, I am not sure how sturdy this thing is or how long it will last. And you cannot tighten the viewfinder to the hot shoe. With any kind of small nudging during daily use, the viewfinder pops out. Overall, I am not pleased with this expensive viewfinder.
I love my Sony RX1. I love it even more with this gem of a viewfinder! Like the RX1 it's very well made & feels solid.If you've never experienced the latest Sony EVFs you're in for a happy surprise. This viewfinder allows you to see exactly what your picture will look like. The super high resolution OLED screen makes you forget that it's an electronic viewfinder. It's that clear & fast.
Answer: I really have not seen a difference; never even thought about it.  The view finder is awesome, but pricy. I paid more for the view finder than the camera, but no regrets.  Bright sunny day, you need the view finder.