Comparison · Batteries

Reliance INR21700-RS50 or Vapcell Boston Power Swing 5300

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: Vapcell Boston Power Swing 5300 (5300 mAh vs. 5200); Test current: Reliance INR21700-RS50 (40 A vs. 13).

Model	Reliance INR21700-RS502026Read review →	Vapcell Boston Power Swing 5300Vapcell / Boston Power · 2021Read review →
Current, A	70	13
Capacity, mAh	5200	5300
Test current, A	40	13
Review conclusion	With reservations	With reservations

Only in one review: Resistance 3 mΩ (Reliance INR21700-RS50); Price 11 $ (Vapcell Boston Power Swing 5300).

Reliance INR21700-RS50: High capacity and strong results, but they heat up and sag under heavy load; the author preferred EVE for high loads.

Vapcell Boston Power Swing 5300: The unusual cells work but showed large variation; the author considers them overpriced and recommends buying only at a substantial discount.

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.