It's definitely a general Chrome issue that it's a resource hungry app. I Googled around (ironic) and found that it's a common issue with Macs and Chrome. Using another browser can save hours in battery, apparently.
In the Activity Monitor there were several entries for Chrome Helper Tool, each accounting for several hundred MB. Safari is fine, but there are no Favicons and I rely on them a lot, so Firefox is looking like the best option right now.