Blackvue B-124X High-Capacity Battery
High-capacity Battery for Parking Mode 40-minute charge/24-hour operation
Capacity 12.8 V / 6,000 mAh / 76.8 Wh.
Input 12 V-17 V. Output 11 V-14.5 V / 2 A (max)
Add more capacity with Power Magic Expansion Battery (B-124E)


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.
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