Do, MW1CFN can you provide some details? What mode are you intending- FM, SSB and digital modes each have their own duty cycles, and therefore challenges. Is this A W/E shack that has all week to recover, or daily use? What rig? Some may require more thought in regard to voltage drop. How far will the battery be from the rig? Do you have access to surplus equipment? This may make an otherwise silly choice, very appealing. Do you have other secondary objectives? For example, do you use your batterys for anything else that would make sense to consolidate?