Two models side by side: measurements taken by the author in their reviews, and their conclusions. The better value in each row is highlighted.
In brief: Based on review measurements: Energy: Power bank for 8 18650 cells (80 Wh vs. 11.95); Test current: Power bank for 8 18650 cells (5.5 A vs. 4); Efficiency: Epilot E4 (86 % vs. 82); Price: Power bank for 8 18650 cells (7.5 $ vs. 11.99).
Only in one review: Voltage 5 V (Epilot E4); Current 2 A (Epilot E4).
Power bank for 8 18650 cells: The author recommends it despite the bus-bar resistance and insufficient controller cooling.
Epilot E4: Works well, with useful pass-through charging and replaceable cells; a modification improves efficiency, but there is no fast charging.
Figures were taken from the review text and checked against the quoted passages. Measurement conditions differ between reviews, so read the reviews yourself before buying. Prices at the time of review.
Power bank for 8 18650 cells2023Read review →
Epilot E42018Read review →