AASTRA DT590 for MD Evolution User Guide EN - Manual (Page 13)

143 MD Evolution – Cordless DT590
Important
• cordless telephones are equipped with Nickel Metal Hydride
(NiMH) batteries or Lithium Ion Lion batteries. 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.
• The initial charging of a NiMH battery will cause the battery to
become warm. This is a normal effect of charging NiMH
batteries.
• The batteries are replaceable, however it is not the intention to
do this frequently.
• Only charge the batteries when placed in the phone.
• Use only the specified battery-packs for your product.
• Never heat or dispose of the battery into a fire, which, or else,
may cause leakage, burst or fire.
• Remove the carrying case from the product while in charger.
• Do not cover the product while being charged. Do not charge
the phone in a closed cabinet or drawer. The charging of the
battery is a chemical process and causes the battery to become
warm during charging. Make sure the environment in which the
phone is charged, is well vented.
• The cordless telephone can be charged either when switched
on or off.
• Do not connect the battery's positive and negative leads
altogether in any case.
• Do not strike or drop the battery. It may cause damage to the
battery.
• Do not charge the battery under the temperature of +5°C
(+41°F). Be sure to charge the battery between the
temperatures of +5°C and +45°C (+41°F and 113°F). Charging
beyond these conditions may impair the battery performance
and shorten the life cycle.