Comparison · Batteries

Reliance INR21700-RS50 or Vapcell K54

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: Reliance INR21700-RS50 (40 A vs. 20).

Model	Reliance INR21700-RS502026Read review →	Vapcell K542021Read review →
Current, A	70	15
Test current, A	40	20
Review conclusion	With reservations	With reservations

Only in one review: Voltage 3.6 V (Vapcell K54); Capacity 5200 mAh (Reliance INR21700-RS50); Resistance 3 mΩ (Reliance INR21700-RS50); Weight 98 g (Vapcell K54).

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 K54: They handle up to 20 A, but capacity was below spec and both capacity and current delivery were worse than the G53.

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.