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Batteries
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All Lithium Ion Batteries, so same rules apply across devices.
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Apple's Battery Page
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New Devices
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Charge to full before the first use.
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Charge Cycles
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Fast charge to 80%, then trickle.
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A cycle is draining and refilling the battery 100%
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Doesn't have to happen all at once. A 50% drain and then charge to 100% is a half a cycle. Next time that is done it becomes a full cycle.
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Apple rates their battery life as # of full cycles a battery can go through
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Important to note that they consider at number to where the battery can retain 80% of it's original charge capacity.
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Better to keep the battery cycling than at either end of the extreme. Plugged in all the time is not the best
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Apple recommends at least one charge cycle per month.
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Avoid extremes
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Over charging or letting a battery sit undercharged for log periods is bad.
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If you need to store a battery do so at 50%
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Deep discharge state can render incapable of holding a charge
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Stored fully charged for a long period could result in some capacity loss.
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Temperature is important too.
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Air flow. Heat is bad. Stored in a case or sleeve? Take out for charging.
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Battery life
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2-3 years under normal usage conditions
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Results will vary depending on use and environment factors
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Dispose of batteries properly
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Swelling if extreme discharge or overcharging occurs
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Li-ion Polymer batteries generate gas when under or over charged.
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My Story about the Macbook Pro Battery
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Battery Replacement
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AppleCare covers batteries against defect, but not capacity loss in most cases
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iPods and iPhones that loose more than 50% of their capacity while under Applecare are covered. Not notebooks
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iPod battery replacements by Apple range from $40 to $79
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iPad replacements by Apple are $99 and iPhones are $79
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Older notebooks have replaceable batteries most around $129
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Newer sealed battery models are $129 for 13" and 15" models. $179 for 17" models. includes services
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Most in-store replacements can happen same day. Mail in 3-5 days.
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3rd party services and batteries
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OWC, TechRestore
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iFixit for DIY guides
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Utilities
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System Profiler
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Apple menu --> About this Mac
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Under Hardware-->Power
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Charge information
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Full charge capacity and Full Charge remaining in mAh. Doesn't show original rated capacity.
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Health Information including Cycle count and Condition
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iStat (iSlayer)
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iBatt USD $19.00
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coconutBattery (free) - please donate
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Closing
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Priority to your emails.
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Hotline: 281-622-4269
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ideas for topics, subjects you'd like covered, etc.
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