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OpenPhone 27 Handset User Guide
Page 11
Charging the batteries
You can charge and discharge the batteries hundreds of times, but they will eventually be
depleted. When the operating time (that is, the call time and standby time) has become noticeably
shorter, replace the batteries. When charging batteries, you should adhere to the following
guidelines:
• Discharge the battery at intervals to achieve long operating times. To discharge the battery,
leave the handset on, but do not place it in the handset charger. Do not attempt to
discharge the battery using other methods.
• Charge the battery for six to seven hours before using your handset for the first time. The
maximum performance of the battery is only reached after three to five charging and
discharging cycles.
• Place your handset in the charger unit regularly in order to reach the optimum battery charge.
- Charging time: 6 to 7 hours from discharged to full capacity.
- Call time: up to 20 hours (fully charged).
- Standby time: up to 200 hours (fully charged).
• After you replace the batteries, the charge level icon will not be displayed until an entire
charge cycle is complete.
Caution: Only use the batteries as directed. Never use a damaged battery. Heat and cold
reduce the performance and the life of the battery. A handset with either a hot or a cold
battery can be temporarily out of operation, even if the battery is fully charged. Dispose of
used batteries in accordance with your local regulations. Never throw a battery into a fire.
An icon in the handset display shows the charge level of the battery.
Icon Battery Charge Level
dghfd
When the battery is nearly depleted, you will hear three short beeps repeated once a minute. If
you hear this warning signal while on a call, you have approximately 3 minutes left before the
handset will switch off.
About silent charging
Use Silent Charging if you don’t want calls to ring your OP27 phone while it is charging. Typically,
you use this feature if your Mitel IP Phone has been associated (programmed into a suite on the
3300 ICP) with your OP27 phone. Then, while your phone is charging, calls to your extension will
now only ring on your Mitel IP Phone.
80 to 100 %
60 to 80 %
40 to 60 %
20 to 40 %
0 to 20 %
Flashing; battery is almost discharged; warning signal sounds