Julian23
Well-Known Member
- Joined
- Nov 16, 2016
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- Country
- Germany
- Dash Cam
- Several brands :)
After using several hardwire kits over the years, I decided to give 70mai’s dedicated dashcam battery pack a try. I wanted a cleaner, more reliable solution for parking mode that wouldn’t put strain on the car’s electrical system, especially during winter.
One key reason for going this route: I wanted to prevent my vehicle’s main battery from being discharged when parked, especially during the colder months, when battery performance tends to suffer and even small power draws can become an issue.
Unboxing & First Impressions
The battery is packaged in a matte black box with only minimal information printed on it.
Opening it up, you're greeted by the battery unit itself, sitting snugly in protective foam. A quick-start guide is placed right on top.
On the right side of the unit, you'll find all the technical data printed on the housing. Nice touch to have it printed directly on the unit for easy information when needed.
The left side hosts all relevant ports: power input, output, a four LED battery level indicator, and the on/off switch. Everything’s clearly labeled and easy to access.
The manual shows two ways to connect your dashcam: via USB-C (5V) or the 12V MR30 output. I went with the latter, using the UP04 with my Omni 4K.
The manual also shows two ways to connect the battery to power. Either with the cigarette lighter or directly wired into the fuse box.
Included in the box are various cables, inline fuses (with spares), and two big Velcro straps for mounting. The fuse taps and cable set feel solid and should be long enough for most installations.
Installation & Mounting
I wired the battery directly to the fuse box for faster charging. It supports up to 11A input (11.2V–30V), and with the hardwire setup, a full charge takes around 60 minutes. For testing, I avoided using the slower cigarette lighter input, which would’ve taken about 90 minutes instead.
I mounted the unit under the passenger seat using the included Velcro strip, and it stays rock solid on the carpet. No rattling, no sliding. Even during sporty driving, it stays in place.
Daily Use
Paired with the Omni 4K and the UP04, the battery pack delivers stable power for extended parking mode. The runtime will depend on ambient temperature and motion events.
Even after 12 hours of parking mode being active, the camera was still running. I should get about 20 hours of run time.
The pack is silent in use, and I haven’t experienced any dropouts or issues powering the camera. It just works without any drama. That’s exactly what I want from a battery solution.
Build Quality & Safety Features
The casing is made from aluminum alloy and feels premium and durable. The unit houses a 96Wh (7500mAh @ 12.8V) LiFePO₄ battery.
It also includes a Battery Management System (BMS) with protection against overcharging, short circuits, temperature extremes, overloads, and over-discharge. There’s even a delayed charging feature that waits 20 seconds after turning on the ignition before pulling power, helping preserve your car’s battery and allowing the car to regulate the voltage before drawing up to 11A.
Outputs & Compatibility
Controls & Convenience
There’s a physical switch on the side that lets you completely cut power to the battery (and therefore the dashcam) when not needed. Perfect if you're not using parking mode in certain locations and want to preserve the battery.
Unfortunately, there is no app to check the exact charge level. The four LEDs will give an approximate value.
Specifications (per 70mai):
Pros:
Final Thoughts
If you're serious about parking mode and want to keep your main car battery out of the equation, the 70mai Battery Pack is a solid choice. Especially when paired with 4G capable dashcams like the Omni 4K, it provides peace of mind with extended runtimes and robust protection features. For users in colder climates or those who leave their car parked for long periods, it's an easy recommendation.
One key reason for going this route: I wanted to prevent my vehicle’s main battery from being discharged when parked, especially during the colder months, when battery performance tends to suffer and even small power draws can become an issue.
Unboxing & First Impressions
The battery is packaged in a matte black box with only minimal information printed on it.
Opening it up, you're greeted by the battery unit itself, sitting snugly in protective foam. A quick-start guide is placed right on top.
On the right side of the unit, you'll find all the technical data printed on the housing. Nice touch to have it printed directly on the unit for easy information when needed.
The left side hosts all relevant ports: power input, output, a four LED battery level indicator, and the on/off switch. Everything’s clearly labeled and easy to access.
The manual shows two ways to connect your dashcam: via USB-C (5V) or the 12V MR30 output. I went with the latter, using the UP04 with my Omni 4K.
The manual also shows two ways to connect the battery to power. Either with the cigarette lighter or directly wired into the fuse box.
Included in the box are various cables, inline fuses (with spares), and two big Velcro straps for mounting. The fuse taps and cable set feel solid and should be long enough for most installations.
Installation & Mounting
I wired the battery directly to the fuse box for faster charging. It supports up to 11A input (11.2V–30V), and with the hardwire setup, a full charge takes around 60 minutes. For testing, I avoided using the slower cigarette lighter input, which would’ve taken about 90 minutes instead.
I mounted the unit under the passenger seat using the included Velcro strip, and it stays rock solid on the carpet. No rattling, no sliding. Even during sporty driving, it stays in place.
Daily Use
Paired with the Omni 4K and the UP04, the battery pack delivers stable power for extended parking mode. The runtime will depend on ambient temperature and motion events.
Even after 12 hours of parking mode being active, the camera was still running. I should get about 20 hours of run time.
The pack is silent in use, and I haven’t experienced any dropouts or issues powering the camera. It just works without any drama. That’s exactly what I want from a battery solution.
Build Quality & Safety Features
The casing is made from aluminum alloy and feels premium and durable. The unit houses a 96Wh (7500mAh @ 12.8V) LiFePO₄ battery.
It also includes a Battery Management System (BMS) with protection against overcharging, short circuits, temperature extremes, overloads, and over-discharge. There’s even a delayed charging feature that waits 20 seconds after turning on the ignition before pulling power, helping preserve your car’s battery and allowing the car to regulate the voltage before drawing up to 11A.
Outputs & Compatibility
- 12V MR30 Output (11.2V–14.2V, up to 2A): Ideal for dashcams like the Omni 4K using the 4G parking surveillance cable.
- 5V USB-C Output (up to 2.4A): Optional for other dashcams or accessories, though I didn’t use this in my setup.
Controls & Convenience
There’s a physical switch on the side that lets you completely cut power to the battery (and therefore the dashcam) when not needed. Perfect if you're not using parking mode in certain locations and want to preserve the battery.
Unfortunately, there is no app to check the exact charge level. The four LEDs will give an approximate value.
Specifications (per 70mai):
- Capacity: 96Wh / 7500mAh / 12.8V
- Battery Type: LiFePO₄ (Lithium Iron Phosphate)
- Charging Input: 11.2V–30V, up to 11A
- Discharging Output: 12V MR30 up to 2A, USB-C 5V up to 2.4A
- Charging Temp: 0°C ~ 45°C
- Discharging Temp: -10°C ~ 60°C
- Dimensions: 11.95 × 21.94 × 3.45 cm
- Weight: 1.4 kg
Pros:
- Very easy to install with a very good manual
- Everything included for installation
- Fast charging via hardwire (approx. 60 minutes)
- Durable, compact aluminum design
- High safety with BMS and LiFePO₄ cells
- Physical power switch adds flexibility
- No app or real-time status monitoring
- Charging at home is not possible via the USB-C port
Final Thoughts
If you're serious about parking mode and want to keep your main car battery out of the equation, the 70mai Battery Pack is a solid choice. Especially when paired with 4G capable dashcams like the Omni 4K, it provides peace of mind with extended runtimes and robust protection features. For users in colder climates or those who leave their car parked for long periods, it's an easy recommendation.
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