Photron FASTCAM SA7, Hardware Manual

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Chapter. 2 Setup
20
2.3.6. Memory Backup Battery (Option)
As an optional accessory, a battery set for conserving video information in the camera memorys is
avalible. In case of an outer power-fail, it can maintain the content of the memory for about 30
minutes in maximum. While powering the system using an outer power supply, the battery set will be
charged automatically.
Moreover, by pressing the
“BATTERY CHECK” botton, LEDs can illumine and the charging status of
the battery can be confirmed even when the outer power supply is cut.

Before recording, check the battery gauge LED, and test and confirm the behavior of camera when
the external power supply becomes disconnected with the POWER SW is kept on.
Replace the battery, in case of the camera stops without supplying power from the battery, or
CHARGE LED is turned off before the battery gauge LED indicates FULL. The cause is that the
battery has a trouble or the lifetime has been out.

The charging stops automatically by a safety circuit when environment temperature becomes out of
a specification. And the charging restarts when the temperature comes back in the specification.

The longevity of battery is about 1 year. However, acknowledge that it could change according the
working circumstance.
For exchange of battery, refer to
“7.1. Contant Information”, Page 68.