Battery Life and Conservation

Discussion in 'General iOS discussions' started by studangerous, Nov 19, 2008.

  1. studangerous

    studangerous Super Moderator Emeritus Staff Member

    Joined:
    Dec 2, 2007
    Messages:
    5,975
    Likes Received:
    30
    Device:
    iPhone 4 (Black)
    Here's a list of tips, tricks and hints to get the most out of your Lithium-ion iPhone, iPod touch or iPad battery.

    • New Device There is NO need to prime your battery with a full charge when you first open the box. The first full or partial charge of a Lithium Ion battery is the same as every other charge it will have. Despite this it is good practice, and in line with the 'frequent charge' rule below, to give it some charge asap as it is has most likely been shipped partially charged. Feel free to play with your new toy while it is charging and to remove it from a charge while only partially charged. Don't waste a moment in enjoying your new gadget

      Please Register or Log in to view images

    • Top up the charge frequently! Charge your device often to prevent rapid erosion of the Lithium-ion battery's capacity. If possible do not let your battery run down to zero (except to recalibrate the battery meter as detailed below. Your battery will fast charge for 1.5 to 2 hours to reach 80% charge and then 'top-up' charge for 2 to 4 hours more to reach 100%, so try to charge a weak battery for at least 2 hours. Lithium-ion batteries lose capacity as soon as they are manufactured but a properly maintained battery is designed to retain an average 80% of its capacity after between 400 to 500 charge cycles.
    • Leaving On Charge You can leave your device on charge for as long as you want. There is a protective mechanism in all Lithium-Ion batteries that prevents 'overcharge'. i.e. don't worry about those long overnight charges.
    • Recalibrate Your Battery Meter - If you charge your device regularly and also use the 'Numerical Battery' you may want to consider running down the battery once per month followed by a full charge. The battery meter tracking the battery's capacity will lose accuracy over time and this full discharge will recalibrate it. If you use the stock Apple battery icon then there's probably no need for such accuracy unless you start to get strange readings.
    • Keep your iPod Touch cool! Lithium-ion battery capacity rapidly decays if exposed to high temperatures. Don't leave your device in the car. Maximum operating temperature suggested is 35° C (95° F). Avoid charging when hot as this can further damage the battery's capacity. If possible remove any cover/skin when charging to help prevent overheating.
    • Maintenance in storage - If your don't use your device regularly, try to complete one full charge cycle per month to slow battery degradation. This can be staggered, e.g. use 50% of battery, charge full and then use 50% again. When not in use store your device below 45° C (113° F) to prevent heat damage to the battery's capacity. Store your device with a partial (~40% best) charge.
    • Stay updated - new firmware and software updates often include more battery-efficient code so update and keep current if you can. Note, jailbreakers/unlockers will want to avoid updating until any new firmware has been deemed jailbreakable.
    • Manage Your Apps - conserve your current battery charge by turning off 3G, WiFi, Edge, SSH and/or Bluetooth when not in use. Other functions such as GPS & Push Email will also cause the battery to drain faster. Turn off the WiFi function 'Ask to Join Networks' as this can leech the battery. Update email manually. Use 'Airplane Mode' in areas of low coverage to prevent continuous scanning draining the battery. Turn off 'Location Services' in Settings when not in use. Hold the home button for 5 seconds to kill any applications running in the background.
    • Equalizer - turn the EQ off if you don't need it.
    • Backlight - Turn the brightness down as low as possible (~10-25% is best) and consider enabling 'Auto Brightness'.
    • Screen Lock - Use a short 'Auto Lock' time. Turn the screen off whenever it's not in use by a quick press of the power button.
    • Beware of daemons (Jailbreak only) - A number of applications on Cydia run 'daemons'. These are processes that run in the background and leach CPU, memory and battery life constantly. Some, such as OpenSSH, are thin and don't pose an issue, while others are battery hogs. It is best to avoid Intelliscreen, Kate, Video Wallpapers or Winterboard themes that change the background in any way. Also note that other apps install low level daemons, e.g. MXTube. Backgrounder and Categories leech battery when in 'Background' mode. Best practice is to avoid apps that run daemons unless you really need them.
    Safety note: If your battery ever becomes too hot to touch while charging then remove from charge immediately and leave to cool [note that it is normal for the device to get warm while charging but it should never be too hot to touch]. If this happens on a regular basis you may need to speak to Apple and possibly return your device and/or USB cable as one or the other may be faulty. Also be aware that cheap USB charging cables and wall adapters should be avoided. It's worth the expense of buying brand names.
    Last edited by a moderator: Dec 31, 2012
  2. murphmanny

    murphmanny Banned

    Joined:
    Sep 19, 2007
    Messages:
    5,250
    Likes Received:
    3
    looks good
    should be helpful
  3. dashwood03

    dashwood03 New Member

    Joined:
    Oct 17, 2008
    Messages:
    671
    Likes Received:
    0
    one word.

    BRAVO

    Please Register or Log in to view images



    really nice job.. This would be very helpful.. Absolutely..
  4. studangerous

    studangerous Super Moderator Emeritus Staff Member

    Joined:
    Dec 2, 2007
    Messages:
    5,975
    Likes Received:
    30
    Device:
    iPhone 4 (Black)
  5. andyt4097

    andyt4097 New Member

    Joined:
    May 8, 2008
    Messages:
    251
    Likes Received:
    0
    Device:
    iPod touch
    Thanks for the pointers!!
  6. Noisemaker

    Noisemaker Banned

    Joined:
    Aug 27, 2008
    Messages:
    410
    Likes Received:
    0
    Awesome. Can we get a sticky?
  7. BroadStBullies

    BroadStBullies Well-Known Member

    Joined:
    Dec 15, 2007
    Messages:
    2,007
    Likes Received:
    26
    Device:
    2G iPod touch
    Thats one hell of a list. Im sure people will use this list often.
  8. Storm Surge

    Storm Surge New Member

    Joined:
    Jan 5, 2008
    Messages:
    335
    Likes Received:
    0
    Device:
    iPhone 3GS (White)
    I heard you were supposed to let your battery run out to zero once a month in order to MAINTAIN longevity?
  9. thechungster

    thechungster Super Moderator Emeritus

    Joined:
    Dec 8, 2007
    Messages:
    6,886
    Likes Received:
    4
    Device:
    iPhone 4 (Black)
    When turning auto brightness it actually increases my brightness. :/
  10. studangerous

    studangerous Super Moderator Emeritus Staff Member

    Joined:
    Dec 2, 2007
    Messages:
    5,975
    Likes Received:
    30
    Device:
    iPhone 4 (Black)
    Not true, but close, though that is the case for old Nickel Cadmium batteries. The second point alludes to what you should do if you are not using your device for a while. From Wikipedia:

    So your full discharge once a month (after 30 daily recharges) is required on a 'regularly' used device to recalibrate the battery meter and prevent erroneous readings. If you use the bar indicator its not really an issue but if you use the numerical battery under boss prefs you may want to do this.

    Turn it off then

    Please Register or Log in to view images

    If you are happy at a low 25% brightness under most conditions that is.

Share This Page