Aastra DT690 User Manual page 13

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2.1.4 Charging and batteries
This product should only be used with the following battery:
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Single chargers shall only be connected with power adapters supplied by the
manufacturer, see list above.
Precautions:
Please read carefully the following important precautions before the first time
use of the batteries. Make sure to understand and observe all cautionary
instructions stated, so as to avoid any possible safety hazards that are caused
by any misuse, misapplication or damage to batteries.
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1424-EN/LZT 103 088 Uen A2 2008-11-21
When unplugging the mains adapter from the power outlet, make sure
that your hands are dry and ensure that you hold the solid portion of the
mains adapter.
Do not pull on cables.
Art.No.: 660190 Battery
Only use batteries, mains adapters or desk and rack chargers which have
been specifically designed for use with your product.
Use of power sources not explicitly recommended may lead to overheating,
reduced battery performance, distortion of the equipment and fire or other
damages.
The phone is equipped with Li-Polymer/Li-lon battery. In a complex
infrastructure, the talk- and standby time may differ, due to the consequence
of the increase in signaling.
The battery must always be completely charged (minimal 4 hours) before
first time use.
The battery in your product is designed to withstand many charge cycles.
Use only the recommended charging equipment.
Improper charging can cause heat damage or even high pressure rupture.
Observe proper charging polarity.
Do not solder lead wires directly onto the battery.
Do not allow water to come into contact with the battery, this could
short-circuit and damage the battery.
If the handset has been exposed for water or condense, remove the battery
immediately and let it dry completely before reinserting the battery.
Important User Information
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