Lithium Battery, Farah Capacitor or Button Battery, Which Is Better Option Apply to Dash Cam? | Linkedin

Lithium battery, Farah capacitor or button battery, which is better option apply to dash cam?

In terms of power supply for a dash cam, there are at least three circumstances to take into account:

1. Normal driving condition-device is being powered through car adapter or hardwire 

2. Car parking time-device power off or in sleep mode, time lapse mode (working)

3. During the driving, external power is off due to the event of collision or other accidents 

Besides to the footage image definition’s quality, another important matter is that device would record every single moment’s drive video, especially in the event of collision, drivers who may be distracted, reckless and downright unscrupulous when it comes to taking responsibility for their mistake and dealing with insurance. 

So, in order to deal with the challenge in the moment of outside power off in suddenly, which type of built-in power is better? here are some truth to tell the pluses and minuses among aforementioned three options:

1. Built-in lithium battery

At the early stage when Dash Cam came up to the market initially, usually it use 100~200 Mah built-in lithium battery to power up the cameras, this is enough to sustain the device for working dozens minutes or even hours, obviously no issues to keep device continue to work for write important clips into the Micro SD card or flash memory, also with such capacity of battery, it’s feasible to have device works for parking mode or motion detection feature.

Over time, in recent years, however, lithium battery is out of choice increasingly, mainly because it has a born-flaw, there is likelihood existed that it would be exploded, expanded or even burning, though it’s rarely occurs, the industry criteria is about 0.05%~0.1%. For safety reason, customer prefer to zero-risk solution if there is one in place.

2. Farah capacitor

There is no concerning of safety risk like lithium material batteries, however, the trait of Farah capacitor makes it’s only able to support a very short working time for the device, this is necessary because through video recording file format which is MP4 or AVI, camera system can not record the clips into memory card in real-time way, there is several seconds delay of video storage. therefore, mere 5 Farah power capacity is meant to supply current to the camera for recording last few seconds footage before car charger or hardwire power failure. 

3. Button battery

The technology of TS video file format bring breakthrough change for dash cam’s software, by using TS streaming file, the camera is able to record the clips in simultaneously, so, battery or super capacitor is no longer necessary at this regard, however, inside power is still needed for this electronic device, because system time must be kept for device to works properly, apparently end user is not possible to set up the system time in every time when device power on.

To recap the discussion, the best option is adopt a button battery and implement TS streaming file video format in software, not only get rid of safety issue,