Comparison · Batteries

Westinghouse WA640N-F1 6V 4Ah or Chinese battery styled as Panasonic NCR18650B

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 at high current: Chinese battery styled as Panasonic NCR18650B (2762 mAh vs. 1536); Test current: Chinese battery styled as Panasonic NCR18650B (3.4 A vs. 2); Energy: Westinghouse WA640N-F1 6V 4Ah (14.9 Wh vs. 10.06); Resistance: Westinghouse WA640N-F1 6V 4Ah (20 mΩ vs. 35.6).

Model	Westinghouse WA640N-F1 6V 4Ah2023Read review →	Chinese battery styled as Panasonic NCR18650B2019Read review →
Capacity at high current, mAh	1536	2762
Test current, A	2	3.4
Energy, Wh	14.9	10.06
Resistance, mΩ	20	35.6
Review conclusion	With reservations	Recommended

Only in one review: Capacity 2998 mAh (Chinese battery styled as Panasonic NCR18650B); Weight 660 g (Westinghouse WA640N-F1 6V 4Ah).

Westinghouse WA640N-F1 6V 4Ah: The battery tested below its rated 4 Ah capacity; the author suspects this unit may be defective.

Chinese battery styled as Panasonic NCR18650B: After 450 cycles, measured capacity was 2762 mAh, 15% below the initial estimate of 3244 mAh.

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.