Noco Genius 5 How Long To Charge. 6V12V 100Ah Battery Charging Time. This is my experience witht the Noco Genius 5 smart battery charger.

The Genius 5 is a 5 Amp battery charger and maintainer. As you can see by the cut out of the linked instructions a battery 20 Ah Amp hour battery will only take about 90 minutes and it goes up from there but your typical car or truck battery can be charged up overnight if need be. 5A Up To 120Ah Batteries Press Hold 5 Seconds.
On the positive cable there is a 10 Amp replaceable fuse.
The connectors inside have a different shape so only NOCO accessories will work. A general rule of thumb when calculating battery charging times is that 1-amp equals 1 hour of charging. The connectors inside have a different shape so only NOCO accessories will work. 6V12V 20Ah Battery Charging Time.

