Leica M Instruction Manual page 147

Charge level displays
In picture mode, the battery charge level is displayed in the monitor
(34) by pressing the button (31).
INFO
Notes:
• Remove the battery if you will not be using the camera for a long
period of time.
• A maximum of 2 months after the capacity of a battery left in the
camera is exhausted (see also the last note under "Charging the
battery", p. 141), the date and time need to be re-entered.
• As the battery capacity deteriorates or if using an older battery,
depending on the function being used warning messages and
displays may appear and functions may be restricted or blocked.
Compatible memory cards
The Leica M saves the pictures on an SD (secure digital), SDHC (high
capacity), or SDXC (eXtended capacity) card.
SD/SDHC/SDXC memory cards are available from various suppliers
and with diff erent capacities and read/write speeds. Particularly
those with high capacities and read/write speeds allow data to be
recorded and retrieved very quickly. The cards have a write protection
switch, which can be used to prevent unintentional storage and
deletion of pictures. This switch takes the form of a slider on the
non-beveled side of the card; in the lower position, marked LOCK, the
data on the card is protected.
Note:
Do not touch the memory card contacts.
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