Hey, I've been gifted an early-2011 MacBook Pro to take travelling, which has had the obligatory 1TB SSD and 1TB hard drive optical bay upgrade, plus 8GB RAM (might go to 16GB). Although the battery has had 700 charges, CoconutBattery claims it has around 75% of its original capacity. In contrast, my aunty's identical model laptop only had 400 charges, yet 4%! That said, I get under two hours of casual internet browsing on it.. whereas I have heard up to 7 is possible? MacUpgrades can sell me a 6000MaH battery for £65.. Should I?