Comparison · Battery packs and power banks

Epilot E4 or 8×18650 power bank

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: Test current: Epilot E4 (4 A vs. 2.3); Efficiency: Epilot E4 (86 % vs. 80).

Model	Epilot E42018Read review →	8×18650 power bank2017Read review →
Current, A	2	2
Test current, A	4	2.3
Efficiency, %	86	80
Review conclusion	Recommended	Recommended

Only in one review: Voltage 5 V (Epilot E4); Energy 11.95 Wh (Epilot E4); Temperature rise 70 °C (8×18650 power bank); Price 11.99 $ (Epilot E4).

Epilot E4: Works well, with useful pass-through charging and replaceable cells; a modification improves efficiency, but there is no fast charging.

8×18650 power bank: A practical, inexpensive power bank for eight cells if high output current and QC are not needed.

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.