The
new iPad 4 / iPad 3 boasts a built-in, 42,5-watt-hour rechargeable,
lithium-polymer battery sealed up in an aluminum-and-glass shell, hard
to open for customers, while iPad mini / iPad 2 / iPad is less avid for
power and content itself with the battery of 25 Wh.
Apple claims that a properly maintained
iPad battery is designed to retain up to 80 per cent of its original
capacity at 1000 full charge and discharge cycles. So, the question is
how to treat iPad battery to extend its life?
Following are a few simple iPad tips, first five are the most important:
- Make sure that you fully recharge
iPad’s battery at least once per month (fully recharge means running the
battery down to 5 per cent and then charging it to 100 per cent)
- Don’t drop the battery charge to low
(less than 5 per cent is very risky as lithium-polymer cells being near
their critical voltage drop the charge very sharply, so you may face
completely dead battery that has no juice to start new charging cycle.
Each battery cell has its own
safe-voltage-limit (~ 3 V). Except the cells in the battery are
perfectly matched for capacity and voltage, whereas you both charge and
discharge them as a whole battery, there is a chance that sooner or
later individual cells will be driven outside their safe voltage range
even if the pack, as a whole, stays within it.
The cells will start out balanced and
tend to stay that way. It can cause the failure of the battery as a
whole. Mind you, a good point is that you should start charging Apple
tablet when the battery charge is less than 10 per cent.
Over discharging the battery will
shorten the lifespan of its battery. The red indicator that will pop-up
on your iPad screen is a good signal to start the recharging cycle.
- To prevent failure, never store the
battery fully discharged. Apply some charge before storage, and then
charge fully before use
- When possible avoid frequent full
discharges. Instead, charge the battery more often. There is no concern
of battery’s memory when applying unscheduled charges. A high residual
charge before recharge is a benefit rather than a disadvantage for
chemistry of Li-Pol battery on all iPads. The best way is to keep
battery between 40 per cent and 80 per cent charged
-Do not overcharge iPad. Overcharging iPad by leaving it charging for the whole night shortens the battery lifespan
-Avoid iPad from both overheating ( 35
°C)and under-cooling ( 0 °C). The optimal temperature for IPad is 22 °C.
The elevated temperatures hasten permanent capacity loss for iPad
battery. The worst condition is running iPad with a fully charged
battery at elevated temperatures. While the battery is kept fully
charged, the inside temperature during operation rises to 45 °C
- Apple claims that temperature is the most important factor that influence the lifespan of iPad battery.
- Free iPad from its leather or any
other case when charging the battery. These cases prevent from adequate
ventilation, and cause extra temperature rise while charging
- To safe battery’s power: turn off
Wi-Fi when it is not in use, and/or adjust screen brightness, and/or
minimize the use of location services, and/or turn off push
notifications, and/or turn off push mail, and/or increase Fetch New Data
interval, and/or turn off push mail, and/or turn off the sound effects
(if they are frequent and as they are activated by default). This can be
done by going to iPad / iPad 2 / iPad 3 “Settings”.
- Be aware that disabling PING service
in the Restriction area of the tablet’s Settings will dramatically
improve the life of its battery.
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