Comparison · Batteries

33140 15Ah LiFePO4 cell or Samsung INR21700-48X

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: Resistance: 33140 15Ah LiFePO4 cell (2.25 mΩ vs. 12).

Model	33140 15Ah LiFePO4 cell2024Read review →	Samsung INR21700-48X2021Read review →
Voltage, V	3.2	3.64
Resistance, mΩ	2.25	12
Review conclusion	With reservations	Recommended

Only in one review: Current 30 A (33140 15Ah LiFePO4 cell); Test current 40 A (33140 15Ah LiFePO4 cell); Energy 17.32 Wh (Samsung INR21700-48X); Weight 270 g (33140 15Ah LiFePO4 cell).

33140 15Ah LiFePO4 cell: Capacity is close to the rating, but its behavior at 40 A puzzled the author, who recommends staying at 0.5–1C.

Samsung INR21700-48X: The cells showed consistent results; the author highlights their cycle life and 10 A continuous current.

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.