As the Noco Genius5 name implies, this is a 5-amp charger that will shorten charge times, particularly useful if you have a larger-capacity battery with a higher amp-hour rating of up to 120 Ah. It has the same useful features as the Genius1 and Genius2, in that it charges lead-acid, AGM, and lithium batteries in 6 and 12 volts, as well as having “force” mode, ambient temperature compensation, and desulfating mode. The plastic case dimensions of 4.6 x 2.9 x 1.9 are larger than those of the Genius1 and Genius2 to accommodate the increased power output. The Genius 5 also offers a mounting bracket and strap. The Genius5 costs a bit more, but it works on smaller batteries as well as the other units here while also doing larger batteries, so if you are looking for a one-charger solution that will cover most any motorcycle or powersports battery, this ends up being the most cost-effective choice. Total reach from AC wall plug to alligator clips is nearly 12-1/2 feet, the same as on the Genius2.