In brief: Based on review measurements: Test current: USB DC-DC board, type one (3.2 A vs. 1.5).
Model USB DC-DC board, type one 2019 Read review → LM2596 DC-DC converter board 2016 Read review → Current, A 3 3 Test current, A 3.2 1.5 Review conclusion Recommended With reservations
Only in one review: Voltage 5 V (USB DC-DC board, type one); Temperature rise 60 °C (LM2596 DC-DC converter board).
USB DC-DC board, type one: Type one handles more current, runs cooler and has less ripple; the author explicitly recommends it.
LM2596 DC-DC converter board: The board works, but its ICs may be counterfeit; the author recommends keeping the load at or below 1.5 A.
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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