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When Using External Power
When the meter is powered using an external AC adapter, the back light display will turn on
upon holding down the button for 2 seconds. It will stay at maximum brightness
continuously until the user presses and holds down the button for 2 seconds again.
Note: If a rechargeable battery is installed while using an AC adapter simultaneously,
unplugging the AC adapter will automatically turn off the back light after it has been lit for 30
seconds.
Charging Circuit
When the external power adapter is plugged in, the power mode will automatically switch and
charge the internal rechargeable battery.
Single charge cycle is about 160 minutes and charge current is approximate 120mA. If a battery
is fully charged, then the 880 will stop charging the battery.
WARNING: DO NOT connect to external power when a non-rechargeable battery is installed.
Doing so will cause the battery to burst and possibly catch fire.
: It indicates low power of a battery if the unit is being powered by the battery. After
connecting the unit to the power adapter the same icon is used to indicate that the battery is
being charged.