Canon LEGRIA HFR16 Instruction Manual page 158

Built-in Rechargeable Lithium Battery
The camcorder has a built-in rechargeable lithium battery to keep the
date/time and other settings. The built-in lithium battery is recharged
while you use the camcorder; however, it will discharge completely if
you do not use the camcorder for about 3 months.
To recharge the built-in lithium battery: Connect the compact power
adapter to the camcorder and leave it connected for 24 hours with the
camcorder off.
Disposal
When you delete movies or initialize the memory, only the file allocation
table is altered and stored data is not physically erased. Take the nec-
essary precautions when you dispose of the camcorder or memory
card, for example by physically damaging it to prevent the leakage of
private data.
If giving the camcorder or memory card to another person, initialize the
built-in memory ( / / only) or memory card using the
[Complete Initialization] option ( 35). Fill it up with unimportant
recordings, and then initialize it again using the same option. This
makes recovering the original recordings very difficult.
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Additional Information