Canon PowerShot SX400 IS Black Manual (en)

For details on charging time and the number of shots and 
recording time possible with a fully charged battery pack, see 
“Number of Shots/Recording Time, Playback Time” (
Charged battery packs gradually lose their charge, even when 
they are not used. Charge the battery pack on (or immediately 
before) the day of use.
The charger can be used in areas with 100 – 240 V AC power 
(50/60 Hz). For power outlets in a different format, use a commercially 
available adapter for the plug. Never use an electrical transformer 
designed for traveling, which may damage the battery pack.
Inserting the Battery Pack and Memory Card
Insert the included battery pack and a memory card (sold separately).
Note that before using a new memory card (or a memory card 
formatted in another device), you should format the memory card 
with this camera (
Open the cover.
Slide the cover (1) and open it (2).