2009-2010 Suzuki DF70A DF80A DF90A Outboard Service Manual, Page 14Get this manual
0A-5 General Information:
Battery Requirement
Suzuki recommends 12 volt cranking type lead acid battery for the DF70A80A90AMinimum battery requirement for starting the engine is provided belowThe battery must satisfy one of the specifications described belowNOTE The specifications listed below are the minimum battery rating requirements for starting the engine Additional electrical loads from the boat will require larger capacity batteries Dual-purpose (CrankingDeep Cycle) batteries can be used if they meet the minimum specifications listed below (MCA, CCA, or RC) Do not use Deep Cycle battery for the main cranking battery The use of Maintenance-Free, sealed, or Gel-Cell batteries is not recommended because they may not be compatible with Suzuki's charging system When connecting batteries in parallel, they must be of the same type, capacity, manufacturer, and of similar ageWhen replacement is necessary, they should be replaced as set It is recommended that the battery be installed in an enclosed case When connecting batteries, hexagon nuts must be used to secure battery leads to battery terminals