Motorola Series M - Manual (Page 20)

About Your Phone, Battery and SIM Card 18 English
Charging the Battery
Insert the connector on the travel charger into the socket at the
base of the phone and the plug into a suitable mains socket.
AThe battery door must be closed during charging.
* The phone can be either on or off during charging.
Using ‘AA’ Batteries
You can use Alkaline and Lithium 1.5 Volt AA Batteries in your
phone. A different battery door is needed. This can be obtained
from your dealer as an accessory.
! These batteries should not be used with Travel Chargers
or Cigarette Lighter Adaptors.