Comparison · Batteries

Basen BS217A or LiitoKala Lii-40A 21700 4000mAh

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: Capacity: LiitoKala Lii-40A 21700 4000mAh (4074 mAh vs. 4000); Capacity at high current: LiitoKala Lii-40A 21700 4000mAh (4041 mAh vs. 3826).

Model	Basen BS217A2020Read review →	LiitoKala Lii-40A 21700 4000mAh2018Read review →
Current, A	30	40
Capacity, mAh	4000	4074
Capacity at high current, mAh	3826	4041
Test current, A	30	30
Review conclusion	With reservations	With reservations

Only in one review: Voltage 3.7 V (LiitoKala Lii-40A 21700 4000mAh); Energy 14.972 Wh (LiitoKala Lii-40A 21700 4000mAh); Temperature rise 90 °C (LiitoKala Lii-40A 21700 4000mAh).

Basen BS217A: The cells suit medium loads but noticeably lag high-current competitors at 20 A.

LiitoKala Lii-40A 21700 4000mAh: Capacity meets the rating, but the claimed continuous discharge current is questionable.

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.