This article applies to LionHeart V1 only
Using the opener key, twist the battery door counterclockwise. Continue twisting until the door pops out
Remove the old battery from the underside device
Check metal battery contact tabs for any damage. If you notice the battery tabs have been bent inwards, use the point of a pen to bend the metal tab outwards to their original position so they will have good contact to the battery.
Observe the ‘+’ symbol on the inside of the battery door. Place the new battery inside the battery door with the + side upwards as shown in the photo.
Carefully insert the battery door back into the device. Ensure the arrows line up.
Twist the battery door clockwise until the arrows line up.