Do I ever have to replace the battery in my Dawg Tag?
Your Dawg Tag contains a lithium battery designed for operational life of 1 to 2 years depending on use. Battery status can be tested by pressing the hidden button and observing the LED. If the LED lights up solid your battery is Good if the LED flashes, flickers or fails to light up, the battery is Weak and should be replaced. The battery is a CR 2450 Lithium cell and can be purchased at most drug or electronic stores, Radio Shack etc. To replace your battery, just remove the two screws in the back of your Dawg Tag and exchange the battery, making sure to put it in with the same side up, and screw the case back together.