Which is more common for dashcams: supercapacitors or lithium batteries?
Simple Answer
Currently, supercapacitors are indeed more prevalent in new dash cams, especially in mainstream and high-end models since 2025, having become the technical mainstream due to their high safety. However, many older or entry-level models using lithium batteries are still available on the market.
Quick Comparison
To help you quickly grasp the key differences, here is a comparison table:
| Feature | Supercapacitor | Lithium Battery |
| Safety | High: Energy storage is a physical process; withstands high temps (-40℃~85℃); no risk of combustion under direct sunlight . | Lower: Chemical battery; can swell or even catch fire in high temps (e.g., inside a car in summer) . |
| Lifespan | Very long: Can be charged/discharged hundreds of thousands of times, far exceeding lithium batteries . | Limited: Cycle life is about a thousand times . |
| Primary Role | Emergency power-off: Provides power to save the last critical video segment after a collision cuts the car’s power . | Continuous recording: Can support the dash cam to work independently for a while without external power . |
| Temp Tolerance | Strong: Wide operating temperature range, stable performance in heat . | Weak: Performance degrades quickly in high temps, posing safety risks . |
| Common Models | Commonly found in 2025+ mid-to-high-end new models. | Often found in older models or some entry-level models. |
How to Choose What’s Right for You
After understanding the differences, you can decide based on your specific needs and driving environment:
- Prioritize supercapacitors if: Your driving environment has hot summers, the car is often parked outdoors in the sun, or you highly value device safety and durability for a “set-it-and-forget-it” solution. This is also the clear current trend in technology .
- Lithium batteries might suit you if: You need longer parking surveillance (note: continuous use may drain the car battery; a more professional solution involves hardwiring with a low-voltage cut-off), or your budget is very tight and you can only opt for entry-level models. If you choose one, be sure to avoid direct sunlight exposure .
Additional Buying Tips
Beyond the power source, also consider when choosing:
- Video Quality: 4K resolution, Sony IMX series sensors (e.g., IMX678), and a large aperture (e.g., F1.5-F1.8) are key for clear video, especially at night.
- Core Features: Ensure the product has essential functions like loop recording, collision lock (G-sensor), and parking monitoring.
- Brand & Certification: Choose products from reputable brands for better quality and after-sales service. Some products having 3C certification is a plus.