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Battery
Your Cobalt uses a rechargeable Lithium Ion battery that is sealed inside the case. Check the battery level (the charge level is
displayed in the Main Menu) and fully charge the battery before the first use and occasionally afterwards. Best battery life will
come from keeping the battery charged. A full charge will last for approximately 40-50 hours of dive time (depending mostly
on screen brightness settings). A battery warning indicator will appear on the dive display if the battery charge is below 20%.
This charge level should still be sufficient to complete several average dives.
On the surface, The Cobalt display will automatically go dark after 5 minutes to conserve power. Press the SELECT button
to wake the display. The Cobalt is never really turned completely off, but has various sensing modes depending if the Cobalt
is wet, or in the “Ready to Dive” screen. It will wake automatically if it is submerged in water and will start a dive if it senses
pressure. However, we strongly recommend that you use the Pre-Dive Check function to ensure your settings are correct, and
manually select the “Ready to Dive” screen before entering the water.
If the Cobalt 2 becomes completely discharged and will not wake, it can be recharged using either the A/C or USB charging
source. However, if you utilize a USB source you will need to perform a manual reset by holding both the SELECT and BACK
buttons down for at least 11 seconds. The A/C charger will provide an automatic reset, and will charge more rapidly. You will
need to reset the time and date (page 14). On powering up again, the Cobalt will return to the time as of the end of the last
dive. Your logged dives, decompression status, and other personal information are preserved and will not be affected by loss
of power. The battery will last several years of normal use before gradually diminishing in capacity, and can be replaced by the
factory or an authorized Atomic Aquatics Dealer.
Charger set-up
The Cobalt can be charged with either the AC quick charger (about 2 hours to full charge) or from a USB cable connected to a
computer (about half the speed of AC charging). The AC charger will automatically select 110 or 220v AC. Plug the end of the
charger cable into the charger/USB adapter. Plug the charger into an AC outlet and the adapter into the bottom of the Cobalt.
The adapter has 2 sides, make sure you insert it into the side nearest the charge method you selected (AC charger or USB).
Confirm charging by going to the main menu. The display will say “charging”. If the battery is either too hot or too cold to
charge properly the message “Charge Stopped” will display until the temperature is within an acceptable range.