User`s 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: To guarantee optimal performance, it is advised that rechargeable

batteries be replaced every year, or when 500 charge/discharge cycles

are achieved. 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 lasts depends on the battery type and how the

device is used. Conserve the battery life by doing the following:

z Avoid frequent full discharges because this places additional strain on the

battery. Several partial discharges with frequent recharges are better than

a full discharge. Recharging a partially charged lithium-Ion battery does

not cause harm because there is no memory.

z Keep the lithium-Ion battery cool. Avoid a hot car. For prolonged storage,

keep the battery at a 40% charge level.

z 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 half of the one with frequent recharges.

Battery charge notice

It is important to consider the environment temperature when 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. This 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.