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: 12.6 V 3 A charger (3.23 A vs. 3); Temperature rise: 12.6V 3A charger (85 °C vs. 102.8); Price: 12.6 V 3 A charger (8.13 $ vs. 11).
Only in one review: Voltage 12.6 V (12.6V 3A charger); Under load 12.68 V (12.6 V 3 A charger).
12.6 V 3 A charger: The inexpensive charger works, but its voltage and current are too high, it overheats, and it needs modification.
12.6V 3A charger: A well-built, stable charger that stays cool, but it does not fully cut off the charging 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.