Power Magic Expansion Battery (B-124E)


Expansion battery for BlackVue Power Magic Ultra Battery
12.8 V / 6,600 mAh / 84.5 Wh
Input 12 V–17 V. Output 11 V–14.5 V / 2 A (max)

  • Features

  • Package Info

  • What's Included

  • Technical Specs

  • Delivery and Returns Information


More than double your Ultra Battery capacity

The Power Magic Expansion Battery (B-124E) more than doubles the capacity of your Power Magic Ultra Battery.
You can even add more than one expansion in sequence.

Compatible with Power Magic Ultra Battery (B-124 and B-124X models)


Is this battery different from a regular power bank?

Yes indeed! The Ultra Battery is made of Lithium Iron Phosphate cells (LiFePO4). Power banks designed as backup batteries for phones and portable electronic devices are usually of the Lithium-ion (Li-ion) or Lithium-polymer (LiPo) type. Those high-density batteries are not suitable for use in a closed parked vehicle (where temperature can reach high–and low–levels) as they risk causing fire or explosion. LiFePO4 batteries can sustain more extreme temperatures, more charge cycles and are also more environment-friendly.

I have this 10,000 mAh power bank that is much smaller than this 6,000 mAh battery. What gives? 

mAh can be misleading if we don’t consider voltage. Tip: think in terms of Watt-hours (Wh). Of course the type of battery should be taken into consideration: high power density batteries have higher capacity for a given volume. In other words, at same capacity, a Li-ion or LiPo battery will always be smaller than a LiFePO4 battery. Still, you should keep in mind that consumer electronics and car accessories assume different voltage values. The milliamp rating of power banks is usually based on a voltage of 3.7V. This means for a 10,000 mAh battery, the total capacity is 10,000mAh x 3.7V / 1,000 = 37Wh. By way of comparison, the Power Magic Ultra Battery has a capacity of 6,000mAh at 12.8V, which translates into 76.8Wh.

Can I use this Expansion Battery in a commercial truck (24V system)?

You must check your Ultra Battery model. B-124 is compatible with 12V systems only, while the B-124X is compatible with 12V and 24V. The Expansion Battery is compatible with either model. However, B-124 won’t work with 24V systems. An easy way to determine which Ultra battery model you have is to check the connectors at the back. The B-124X model has a USB port, while B-124 does not. 

Can I bring the Power Magic Ultra Battery on a plane?

Yes, in carry-on luggage, in theory. But since batteries can be sensitive items to bring on an airplane, check with your local operator to be on the safe side. According to the IATA (International Air Transport Association) spare batteries under 100Wh can be carried on a plane in a carry-on luggage–NOT in checked luggage–like most lithium batteries, without requiring the operator’s approval.

Weight 1.8 kg
Dimensions 27 × 20 × 24 cm
Battery Expansion Battery (B-124E)

What's Include

  • Power Magic Expansion Battery (B-124E)
  • Connector Cable
  • 2 velcro strips
  • User Manual
Model NamePower Magic Expansion Battery (B-124E)

12.8 V / 6,600 mAh / 84.5 Wh

Product Dimensions

Black / 157 mm (W) x 171 mm (L) x 39.5 mm (H) / 1.3 kg

Operation Temperature

Charging Temperature: 0 °C − 45 °C (32 °F − 113 °F)

Discharging Temperature: -10 °C − 60 °C (14 °F − 140 °F)

Storage Temperature: -10 °C − 60 °C (14 °F − 140 °F)

Backup Battery

Type: LiFePo4


Input Power

1 (Ultra) + 1 (Expansion):

§  Cigarette lighter plug (standard 5 A charging): Approx. 1 hour 40 mins in total

§  Hardwired (rapid 9 A charging): Approx. 60 mins in total

Power Consumption Hour

1 (Ultra) + 1 (Expansion):

§  Up to 56 hours in total (based on a single dashcam that consumes 3 Wh)

  • We ship globally via DHL, with a few exceptions. Refer to our Shipping Countries List for a full list of countries where we ship.
  • Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer’s responsibility.
  • Please check with your country’s customs office to determine what these additional costs will be prior to buying.
  • For return conditions information please refer to our Warranty Terms and Conditions page.
  • Orders are processed in South Korea, from Monday to Friday, 9am to 6pm KST.
  • *Not applicable to Third-Party Accessories, which is handled by its own Sellers.