Quote:
Originally Posted by Yolina
I'd love to know exactly how much extra weight waterproofing adds
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Using the best commercial comparison I know of: about minus 7 grams

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The Kobo H2O is 233 gm and the Kobo Aura HD is 240 gm. Those two devices are likely as similar as you're going to get for a comparison.
And that's on a bigger device which theoretically should mean more weight to waterproof (more area requiring waterproofing).