$50 battery may double the run-time of the Acer C7 Chromebook...
Quote: "Several of Acer’s inexpensive 11.6 inch notebooks use the same batter. The Acer Aspire One 756, Acer TravelMate B113, and Acer Aspire V5-171 Windows laptops and the Acer C7 Chromebook all have the same 3-cell battery and typically offer between 3 and 4 hours of battery life.
But if you pick up a 3rd party 6-cell battery you can get about twice as much run time."
I understand in the US Acers only offered a 3-cell, 2500mAh battery. But in other countries Acer offer a some of the above laptops with higher-capacity batteries, that were interchangeable.
Quote: "Bear in mind, the extended battery is bigger and heavier than the 3-cell battery, so it’ll make these portable notebooks slightly bulkier. But that may be a small price to pay for the ability to fly from one coast of the US to the other and use your notebook without recharging it."