When inserting or replacing coin cell batteries it’s necessary to know which way round to place the battery. This is especially so for some of our beacons where the battery is separate or not included.
The following image shows the orientation of the battery. The -ve ‘button’ side of the battery fits against the printed circuit board. The side that faces away from the beacon circuit board is +ve. This is common to just about all beacons. Note that this is different to commonly used batteries, such as AA batteries, where the ‘button’ end is +ve.
Here’s another example showing a commonly used metal battery holder:
If you put the battery in the other way around then you might damage the beacon or, more likely, short circuit the battery as most battery holders are metal wrap around types.