BlackVue Power Magic Ultra Battery Expansion Pack (B-124E)

$269.99 USD


BlackVue Power Magic Ultra B-124E

B-124E can only function when connected to a B-124, and is not a standalone product.

The BlackVue B-124 Power Magic Ultra Battery Pack is the newest battery pack to hit the market. It's bigger and better than the previous generation B-112.

But what if that wasn't enough? If the battery life of the B-124 unit alone isn't enough for you, you can extend it using the Power Magic Expansion Battery Expansion Pack (B-124E). This Expansion Pack doubles the energy stored, allowing the B-124 system to last for more than double the amount previously stated. Multiple Expansion packs can be chained together to create a system that can last for as long as you desire!

Power Duration

A Fully charged B-124 can run a DR900S-1CH dash camera for about 25 hours while a dual channel system like the DR900S-2CH will be about 15 hours with it’s integrated 76.8Wh.

A Fully charged B-124 can run a DR750S-1CH dash camera for about 28 hours while a dual channel system like the DR750S-2CH will be about 18 hours with it’s integrated 76.8Wh.

Having one Expansion pack attached can double these numbers. The expansion packs differ from the base system by having a boosted, integrated 84.5 Wh capacity.


Stay tuned for our review! For more information, see below for our video reviews, sample footage, and guides.

Review: B-124

What is a Battery Pack?

Installation: Battery Pack

For more YouTube videos on the BlackVue B-124E, click here.

What's Included

  • B-124E Battery Pack
  • Charge Transfer Connector Cable
  • 2x Velcro Strips
  • User Manual

Cables Explained

Charge Transfer Connector Cable - Allows the Power Magic Expansion Battery Pack to connect to another unit. This will allow the units to transfer charge to one another.



84.5 Wh


60 min (9A Hardwire) | 1 hr 40 min (5A Cigarette Plug)


14.6V / 5Ah






157mm X 171mm x 39.5mm




-10°C - 60°C (14°F - 140°F)


South Korea


1-Year Manufacturer Warranty


What is Parking Mode?

Parking mode is offered on most of the dash cams available at BlackboxMyCar. While it is important to protect your vehicle while driving, it is just as important to have your vehicle protected while it is parked. When the dash cam is in parking mode, footage will only be saved when there is an impact and/or motion. Parking mode can be enabled with a hardwiring kit or a battery pack.

For more information on parking mode, click here.

What is a Hardwire Kit?

A hardwiring kit enables parking mode. It allows your dash cam to remain powered on even when the vehicle's ignition is turned off. Installation is a breeze as you will only need to find an accessory fuse, constant fuse, and a grounding point.

What is a Battery Pack?

Most customers purchase the battery pack to avoid using the vehicle’s battery to power their dash cam. The battery pack is charged by either being hardwired into an accessory fuse or by being plugged into one of the vehicle's 12-volt cigarette sockets. We recommend the hardwiring the battery pack as it charges the battery pack quicker.

For more information on Battery Packs, click here.

How much footage will my memory card store?

On average, a 2-channel dash cam writes 16GB/hour and a 1-channel dash cam writes about 8GB/hour.

Click here to see all the memory cards we carry.

Do I need a Rear Camera?

Accidents or events don't always happen at the front of the vehicle! Having a rear camera provides coverage for any events or accidents that may happen at the rear of the vehicle.

For more information on rear view cameras, click here.

Do I need a IR Rear Camera?

An IR camera is designed to record the interior of the vehicle in low light conditions. This option is very popular among rideshare drivers.

For more information on why rideshare drivers need dash cams, click here.

What is a CPL filter?

A CPL filter attaches to the dash cam lens to eliminate lens flares, light reflections, and windshield glares.

For more information on CPL filters, click here.

Where do I find the Latest Firmware?

Find the latest firmware and all downloadable content here.