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max2

macrumors 603
Original poster
May 31, 2015
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Is it bad to run a phone battery all the way down to 1% before charging ?
 
Modern lithium ion batteries usually prefer the range of 40-80%. Staying for long periods of time at 100% or 1% will significantly reduce the lifespan of your battery.

Will going down to 1% every now and then hurt your battery? Not terribly but ... avoid it if you can.


Thank you.
 
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I used to go down to 1% several times per week. I now always try to preserve my battery by recharging at around 15%.
 
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The Batt Univ 808 article is excellent and covers the high stress factors well, but IMHO falls short covering the benefits of low SoC/voltage in daily use devices. IMHO, the ‘keep-it-over-40%’ comes from infrequent use devices and long-term storage recommendations where batts may eventually self-discharge below critical minimums, but that’s not a risk on a daily use devices like smartphones.

Supplement BU808 with THIS and THIS (smartphones use LCO/Lithium Cobalt Oxide).
 
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