Most of Schumacher’s battery chargers no longer have a deep-cycle setting. Instead, find out what type of battery you have and use that setting (Standard, AGM, Gel, or Lithium). If you are not sure what type of battery you have, select the gel battery type, because it will not damage the battery.
Note: Schumacher does not recommend using the gel battery setting over a long period of time if you are unsure of your battery type. While the gel battery setting will not cause immediate damage if used on a different battery type, long-term use will eventually cause the battery to lose some of its capacity.