improve battery life
You don’t need to be constantly worrying about your battery or reaching for your charger. Get the most from each charge and the most charges from each battery with these tips for MacBooks and iOS devices. Upgrade to Mavericks if you haven’t already. Features like Timer Coalescing, App Nap and Safari Power Saver all reduce the power demands of the operating system. If you’re playing games on your iPad or iPhone, turn on Airplane mode. Not only will you avoid the power drain from the Wi-Fi and cellular antennas, but in many cases you also avoid the in-game ads. Don’t leave your laptop fully charged if you don’t use it much. Full charge slowly degrades the battery and after a year it will have lost 20% of its original capacity. High temperatures are even worse. At 40º, the battery degrades two to four times faster than at 25º. Lithium batteries are rated for 500 charge-discharge cycles before they lose half of their original capacity. But this is for a full discharge from 100% to zero. If you top up the battery before it is fully discharged it lasts much longer. Charging your iPad from 75% gives you 2,500 charge cycles, which is once a day for seven years.
Airplane mode saves battery by switching off Wi-Fi and Bluetooth.