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It stored data for 5 dives and had a user replaceable 3.6 V battery, which lasted for around 800 dives. For some time it was the most commonly seen dive computer, particularly in Europe. Later versions had a battery which had to be changed by the manufacturer and an inaccurate battery charge indicator, but the brand remained popular. [47] [76]
Button, coin, or watch cells. A button cell, watch battery, or coin battery is a small battery made of a single electrochemical cell and shaped as a squat cylinder typically 5 to 25 mm (0.197 to 0.984 in) in diameter and 1 to 6 mm (0.039 to 0.236 in) high – resembling a button.
Failure alarms are more troublesome because they usually require periodic testing to make sure the sensors are working and that the correct signals are getting through to the monitor. Some systems are designed to detect problems internally, such as low or dead batteries, loose connections, phone circuit trouble, etc.
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