Canon PowerShot A5 Reference Manual page 76

Appendix A continued....4/4
Storage Precautions
Battery packs continually discharge small
amounts of energy while installed in the camera.
Long storage of a battery pack in the camera
could cause unnecessary discharge that will
shorten its life.
We recommend that you remove the battery
pack from the camera if you do not anticipate
its immediate use. Store it in a cool, dry place in
the case provided. Before resuming use, ensure
that you charge the battery pack fully.
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Specifications
Type: Nickel-hydride cells
Rated Voltage: 6 V
Rated Amperage: 650 mAH
Life-Span: Approximately 300 charges cycles
Operating Temperatures: 0 to 40 C
Dimensions: 34 x 22 x 49 mm
Weight: Approximately 70 g
Subject to change without notice.