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Apple Computing Products:
macOS - Notebook Hardware
Bad DC in board or just bad luck?
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<blockquote data-quote="pigoo3" data-source="post: 1527366" data-attributes="member: 56379"><p>Suggested max. battery life on these is around 300 cycles. Anything beyond that I think is considered "bonus"...where you start getting reduced total runtimes on a full charge (less than Apple's original claims when the computer was new).</p><p></p><p>Although the cycle count on both of these old batteries is much different...each may have "lived" very different lives. Thus runtime on a full charge for each of these batteries may be similar at 20 minutes each...even though the charge count is much different.</p><p></p><p>Also...be very careful when quoting "charge percentages":</p><p></p><p>- 75% charge on a brand new battery (that's supposed to be good for 4-5 hours of runtime when full) would be equivalent to 3 hours+.</p><p>- 75% charge on a OLD battery (with 650 charge cycles...that only gets 20 minutes on a full charge)...is only around 15 minutes.</p><p></p><p>So saying a battery has a "75% charge"...can mean MUCH different things depending on the condition/age of the battery.</p><p></p><p>- Nick</p></blockquote><p></p>
[QUOTE="pigoo3, post: 1527366, member: 56379"] Suggested max. battery life on these is around 300 cycles. Anything beyond that I think is considered "bonus"...where you start getting reduced total runtimes on a full charge (less than Apple's original claims when the computer was new). Although the cycle count on both of these old batteries is much different...each may have "lived" very different lives. Thus runtime on a full charge for each of these batteries may be similar at 20 minutes each...even though the charge count is much different. Also...be very careful when quoting "charge percentages": - 75% charge on a brand new battery (that's supposed to be good for 4-5 hours of runtime when full) would be equivalent to 3 hours+. - 75% charge on a OLD battery (with 650 charge cycles...that only gets 20 minutes on a full charge)...is only around 15 minutes. So saying a battery has a "75% charge"...can mean MUCH different things depending on the condition/age of the battery. - Nick [/QUOTE]
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Apple Computing Products:
macOS - Notebook Hardware
Bad DC in board or just bad luck?
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