BT 75 User Manual page 28

BT Response 75 – Issue 2 – Edition 1 – 7/10/03
If the battery warning light was not lit
before the power was lost, all information
should be retained for at least one hour
(up to 6 hours for a fresh alkaline
battery).
If the light was on, data may be lost even
if a back-up battery was installed.
If no battery was installed, all information
will be lost and the BT Response 75 will
power up as new when power is restored.
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