Replacing the Descent T2 Transceiver 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 transceiver is powered by a 3 V CR123A lithium battery. A battery pre-installed at the factory. You mustcarefully follow the battery replacement instructions to preserve the transceiver’s waterproofing.
- Insert a coin or flat screwdriver into the slot
, and rotate counter-clockwise to unscrew the battery cap.
- Remove the battery cap and battery.
- Insert the new battery in the transceiver, with the positive pole facing into the transceiver and the negative pole facing the battery door.
- 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 T2 product page on Garmin.com.sg to purchase accessories.
- Apply a thin layer of waterproof silicone grease to both gaskets.
- Replace the battery cap into the transceiver, and fully tighten it.