User Manual

Device Information
Replacing the Descent T1 Battery
NOTICE
You should purchase a replacement battery only from a high-quality manufacturer and a reputable vendor.
Using a low quality battery could result in poor product performance and reduced battery life, especially at low
temperatures. Do not use rechargeable batteries. Rechargeable batteries may have a higher voltage
specification and can cause permanent damage to the device.
To replace the battery, you need a coin or flat screwdriver, a new 3 V CR123A lithium battery, and waterproof
silicone grease. You may also need a replacement battery cap accessory.
The transmitter is powered by a 3 V CR123A lithium battery. A battery is pre-installed at the factory. You must
carefully follow the battery replacement instructions to preserve the transmitter's waterproofing.
1 Insert a coin or flat screwdriver into the slot , and rotate counter-clockwise to unscrew the battery cap.
2 Remove the battery cap and battery.
3 Insert the new battery in the transmitter, with the positive pole facing into the transmitter and the negative
pole facing the battery door.
4 Inspect both gaskets to verify they are clean, undamaged, and fully seated in the grooves.
If the gaskets appear worn or damaged, you can purchase a replacement battery cap kit, including a cap,
gaskets, and silicone grease. Go to the Descent T1 product page on garmin.com to purchase accessories.
5 Apply a thin layer of waterproof silicone grease to both gaskets.
6 Replace the battery cap into the transmitter, and fully tighten it.
Device Care
NOTICE
Do not grip the regulator or the transmitter to move, carry, or adjust the air tank.
Do not remove the safety plug from the base of the transmitter.
Do not use a sharp object to clean the device.
Avoid chemical cleaners, solvents, and insect repellents that can damage plastic components and finishes.
Thoroughly rinse the device with fresh water after exposure to chlorine, salt water, sunscreen, cosmetics,
alcohol, or other harsh chemicals. Prolonged exposure to these substances can damage the case.
Avoid extreme shock and harsh treatment, because it can degrade the life of the product.
Do not store the device where prolonged exposure to extreme temperatures can occur, because it can cause
permanent damage.
Discontinue use if the device is damaged or if it is stored at a temperature outside the specified storage
temperature range.
Discontinue use if there is water ingress into the battery compartment. Even small amounts of water can cause
corrosion of the electrical contacts.
Cleaning the Transmitter
1 After each dive, rinse the transmitter with fresh water to remove salt and debris.
2 If necessary, clean the transmitter with a soft cloth.
12 Device Information