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Thread: Battery Charge Style: Which is better?

  1. #1
    Default Battery Charge Style: Which is better?
    Usually there are a couple of types of batteries that have a couple different charging styles.

    Which is better for the iPhone battery life:

    - Charge whenever possible (or at least throughout the day repeatedly and at night).

    - Charge only at night.

    - Charge only when the battery is low.

    Anybody have any ideas?


  2. #2
    Former Owner / Founder of ModMyi Kyle Matthews's Avatar
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    Usually the general rule with batteries is to charge only when they're low, and a battery's life (overall, not per cycle) is determined by how many charge cycles it goes through, not how long it lasts total.

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  4. #3
    Found this on
    (it has ipod in the URL address but also talks about iPhone and both use the same type of battery - Lithium ion)

    Concerning leaving the battery fully charged...

    This can also be a more complicated issue. Lithium ion batteries age faster when stored at full charge. If your usage of the iPod consists almost exclusively of use while plugged in for extended periods of time such as weeks or months, and very limited usage from the battery, the battery is essentially always in a charged state. A fully charged lithium ion battery ages at a faster rate than a lithium ion battery at the optimum storage capacity of approximately 40%. However, keeping an iPod battery near this optimum storage capacity can prove difficult to manage. A lithium ion battery also ages from use, as well as from storage, so the aging effects of constant use of the battery in order to keep the charge closer to 40%, versus constant use while attached to external power, come close to being even.

    However, if you leave the iPhone in the dock over night, like the iPod, "circuitry will no longer charge the battery once it is determined to be full"

    So i think ill just charge overnight unless otherwise needed.......

    thanks for the response pf

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