70mai’s new tried-and-tested 4K dashcam (with rear camera and SD card) gets a huge 40% Amazon discount
Dashcam Market Trends: The Shift Toward Thermal Resilience and Dual-Channel Reliability
The 70mai 4K A810 Lite dual-channel dashcam bundle is currently available on Amazon for $89.95, representing a 40 percent discount from its $149.99 MSRP. This promotional package includes the 4K front camera, an RC21 1080p rear unit, and a 64 GB microSD card. According to Notebookcheck, the device has seen over 2,000 units sold in the last month, driven largely by its integration of supercapacitor technology rather than traditional lithium-ion batteries.
Why Dashcam Manufacturers Are Moving Away from Lithium-Ion
Heat resistance is becoming the primary differentiator in the dashcam market. Traditional lithium-ion batteries often degrade or pose safety risks when exposed to the extreme temperatures inside a parked vehicle during summer months.
To mitigate these risks, 70mai has equipped the A810 Lite with a supercapacitor. According to hands-on testing by Notebookcheck, this component is rated to withstand cabin temperatures up to 85°C. This shift toward capacitor-based power systems allows for greater longevity in harsh environments, a trend likely to become standard as consumers demand hardware that survives seasonal climate extremes.
The Trade-off Between Resolution and Frame Rates
Achieving a sub-$100 price point for a dual-channel 4K system requires specific hardware compromises. While the 70mai A810 Lite offers high-resolution imagery, users should be aware of how dual-channel recording affects performance.
Data from Notebookcheck indicates that when the rear camera is active, the front camera’s frame rate drops from 30 frames per second to 24 or 25 frames per second. This reduction can introduce motion blur when capturing fast-moving vehicles on highways. While 4K resolution provides significant detail, the lower frame rate is a critical consideration for drivers prioritizing evidence collection at high speeds.
Performance Disparities in Low-Light Conditions
Not all cameras in a dual-lens system perform equally. While the front sensor on the A810 Lite demonstrates effective exposure mapping in unlit, nighttime environments, the secondary 1080p rear camera struggles to match that output.
Testing confirms that the rear unit is prone to digital noise and intense headlight glare when operating in the dark. For consumers, this highlights a common industry limitation: manufacturers often prioritize the primary front-facing sensor for HDR performance, while relegating the rear unit to a secondary role that may lack the same sophisticated image processing.
Frequently Asked Questions
Does the 70mai A810 Lite support 4K recording in dual-channel mode?
Yes, but with a frame rate reduction. Activating the rear camera drops the front recording speed from 30 fps to 24 or 25 fps, according to Notebookcheck.
Why is a supercapacitor better than a lithium-ion battery for a dashcam?
Supercapacitors are significantly more heat-resistant than lithium-ion batteries, making them safer for use in cars that reach high internal temperatures while parked in direct sunlight.
What is included in the current Amazon bundle?
The $89.95 bundle includes the 70mai A810 Lite 4K front camera, the RC21 1080p rear camera, and a 64 GB microSD card.
Is the rear camera as effective as the front camera at night?
No. Testing shows the rear camera suffers from increased digital noise and headlight glare compared to the front-facing sensor.
Are you currently using a dashcam for your daily commute, or are you waiting for 4K dual-channel systems to become more affordable? Share your experiences with camera reliability in the comments below.