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T-Mobile MDA III User Manual12
T-Mobile MDA III User Manual 13
1.2 Battery
WARNING: To reduce the risk of re or burns, do not disas-
semble, crush, puncture, short external contacts, heat above
60℃ (140℉), or dispose of in re or water. Replace only with
manufacturer specied batteries. Recycle or dispose of used
batteries as stipulated by local regulations.
Your T-Mobile MDA III contains a rechargeable Li-ion poly-
mer battery under the back cover. Battery power depends on
whether you are talking on the phone, using the PDA, or if
the device is on standby.
Battery life estimates:
n Talk-time: 3 - 4 hrs.
n PDA: 15 hrs (approx.).
n Standby: 168 hrs (approx.).
n Data retention time: 72 hrs.
The above are based on using one function at a time. Battery
life may vary with switching between functions.
Data retention
It is vital to keep your battery charged. Because your T-Mobile
MDA III does not have a hard drive, all data and any new
programs you install are stored in the RAM. If the battery
completely drains, any data or new programs you installed
will be erased. Only the default programs that came with the
device at the time of purchase will remain.
To prevent this kind of data loss, a portion of the main battery
will keep your data safe for 72 hours if your device runs out
of power. An additional battery, the internal backup battery, is
designed to keep your data safe when you remove the main
battery. It will keep the data safe for
20 minutes.
WARNING: Be sure to check that the internal backup
battery power remains at least at 50% OR ABOVE before
you remove the main battery by tapping
> Settings >
System tab > Power