Sanyo NCR20700B or Samsung INR21700-40T

In brief: Based on review measurements: Test current: Samsung INR21700-40T (37 A vs. 20).

Model	Sanyo NCR20700B2019Read review →	Samsung INR21700-40T2019Read review →
Current, A	15	35
Capacity, mAh	4200	4200
Test current, A	20	37
Review conclusion	With reservations	Recommended

Only in one review: Temperature rise 100 °C (Samsung INR21700-40T).

Sanyo NCR20700B: It delivered 4200 mAh at 0.2C; the author advises against sustained loads above 10 A.

Samsung INR21700-40T: The cell sustains 30–35 A, handles 40 A briefly, and is well suited to power-tool packs.

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.

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