Comparison · Batteries

Tenpower INR21700-50SG or JSK 32140 15Ah

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: JSK 32140 15Ah (40 A vs. 20); Temperature rise: JSK 32140 15Ah (56 °C vs. 71.4).

Model	Tenpower INR21700-50SG2026Read review →	JSK 32140 15AhTZJSK · 2026Read review →
Test current, A	20	40
Temperature rise, °C	71.4	56
Review conclusion	Recommended	Recommended

Only in one review: Current 20 A (Tenpower INR21700-50SG); Capacity 4931 mAh (Tenpower INR21700-50SG); Resistance 1.8 mΩ (JSK 32140 15Ah).

Tenpower INR21700-50SG: Mid-range cells without standout current or capacity, but they work well and may, in the author's view, deliver over 20 A.

JSK 32140 15Ah: Good cells, performing close to EVE IFR33140 and pleasing the author.

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.