Battery Charge Notice - Unitech PA690 User Manual

If the main battery is removed, the backup battery ensures the data on SDRAM
is safe for up to 2 hours. To prevent data loss, do not leave the PA690
uncharged with the main battery removed for an extended period. See the
Charging the Battery unit on for more details.
Note: Rechargeable batteries are advised to replace every year or when 500
charge/discharge cycles achieved to guarantee optimal performance. It
is normal that the battery balloons or expands beyond one year or the
maximum of 500 cycles. Although it does not cause harm, it cannot be
used again and must be disposed of according to the location's safe
battery disposal procedures.
If the performance decrease is greater than 20% in a Lithium-Ion battery,
the battery is at the end of its life cycle. Do not continue to use, and
ensure the battery is disposed of properly.
The length of time that a battery power lasts depends on the battery type and
how the device is used. Conserve the battery life through the following:
Avoid frequent full discharges because this places additional strain on the
battery. Several partial discharges with frequent recharges are better than
a deep one. Recharging a partially charged lithium-Ion battery does not
cause harm because there is no memory.
Keep the lithium-Ion battery cool. Avoid a hot car. For prolonged storage,
keep the battery at a 40% charge level.
Do not leave the lithium-Ion battery discharged and unused for an
extended period because the battery will wear out and the longevity of the
battery will be at least shorter than half of the one with frequent recharges.

Battery charge notice

It is important to consider the environment temperature whenever the
Lithium-Ion battery pack is charged. Charging is most efficient at normal room
temperature or in a slightly cooler environment. It is essential that batteries are
charged within the stated range of 0°C to 40°C. Charging batteries outside of
the specified range could damage the batteries and shorten their charging life
cycle.
CAUTION! Do not charge batteries at a temperature lower than 0°C, which will
increase the internal resistance to cause heat and make the
batteries unstable and unsafe. Please use a battery temperature
detecting device for a charger to ensure a safe charging
temperature range.
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