Hema Dash Cams - How does the hardwire kit protect against battery drain?

The hardwire kit will protect your dashcam from draining your vehicle’s battery. If your vehicle’s battery voltage gets too low, the 3-wire hardwire kit will stop powering your camera to save power.

Set the cut-off voltage to the preferred voltage limits before the hardwire kit cuts off the output. There are four protection bands set within the hardwire kit for your selection.

For 12V batteries:

The protection voltages are 11.8V / 12.0V / 12.2V / 12.4V. The 12.2V setting is recommended for general driving conditions. 

For 24V batteries:

The protection voltages are 23.6V / 24.0V / 24.4V / 24.8V. The 24.4V setting is recommended for most users in general driving conditions.

The hardwire kit will identify the lead acid battery type automatically (12V or 24V) and protect your battery from draining accordingly. 

Which protection voltage to set:

Use the table below to help determine the desired voltage cut-off level for battery drain protection. 

For example, if the temperature is 38°C and you want to keep a 75% lead acid state capacity remaining in your battery when the hardwire kit cuts off output (meaning the battery voltage is approximately 12.4V) the cutoff voltage should be set at the 12.4V band. This means that there will be a 25% capacity in your vehicle battery to be used for your dashcam while your vehicle is parked. 

Please be advised that the above table is to be used as a reference guide only in order to determine an appropriate voltage selection dependent on the battery age and condition.