Replacing Batteries 31 Using the Batteries
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charge. If all LEDs are lit, the battery is fully charged, if only one LED is lit, 25% or less charge is
left.
Replacing Batteries
MP40/MP50 You can replace batteries without switching off the monitor, if you replace them one at a time and if
the remaining battery has sufficient power. The Battery Missing INOP is suppressed for 30
seconds while you exchange each battery.
MP20/MP30 When using the monitor with only one battery, insert the new battery before removing the previous
battery, to avoid leaving the monitor without power.
To replace batteries,
1Press the battery compartment latch to open the battery compartment door.
2To replace battery 1, rotate the battery retainer until the battery can
be removed.
To replace battery 2, rotate the battery retainer until the battery can
be removed.
3Pull gently on the canvas strap to move the battery towards you, then
grasp the battery and pull it out fully.
4Slide the new battery into position, making sure that the positive and
negative poles are facing in the correct direction, as outlined on the inside of the battery
compartment door.
5Repeat with the second battery if required.
6Center the battery retainer and close the battery compartment door.
Optimizing Battery Performance
The performance of rechargeable batteries may deteriorate over time. Maintaining your batteries as
recommended here can help to slow down this process.