Are you a laptop user? Do you wish your web browser wasn’t so power hungry? Then it’s time to ditch Chrome and give Opera’s new battery-boosting feature a try.

In a head-to-head test against Google Chrome, Opera says their browser is already marginally better when it comes to efficiency. On the laptops they tested — a Lenovo ThinkPad X250 and a Dell XPS 13 — Chrome burned the battery up after an hour and 54 minutes. Opera stretched that to an hour and 58 minutes.

Flick on power saving mode, however, and Opera positively crushes Chrome. It ran for an additional hour before the battery was depleted. That’s almost a 50% increase! That’s an unbelievable increase, right? It really is. The key is “up to,” because that means you’re only going to see this kind of improvement under very, very specific circumstances.

This chart was posted on the Internet, so it must be true

Opera’s testing method involved selecting 11 popular websites (including YouTube), opening one of them in a new tab, scrolling five times, and then repeating the process until the laptops went dead. The test was repeated three times and an average was taken — which is where their up to 50% claim ultimately came from.

It may not have been a fair fight, however. Opera’s power saving mode does do some different things like limiting activity in background tabs, pausing unused plug-ins, reducing frame rates, and reducing the number of times your processor wakes to respond to JavaScript timers.

It also invokes the built-in ad blocker, and we already know what a huge difference blocking ads can make to a laptop’s battery life. If they were testing stock browsers, then, Opera gets a leg up because Chrome doesn’t ship with a blocker.

Sensational claims aside, it’s good to see that Opera is taking a good, hard look at how they can make their browser run more efficiently.