Is Excessive De-sulfation Especially Rampant In aviation batteries?
Yes, primarily for two main reasons; high battery case temps (both when in use and in long-term on-board storage) AND infrequency of use. Infrequently used aircraft which mount their batteries inside cowls (near the hot engine), or in un-insulated fuselage tailcone areas (such as Mooneys and most Cessna, Beech, and Piper aircraft) which are then stored in un-insulated hangars or sit outdoors in the hot sun are especially prone to excessive battery plate sulfation. In short, most GA applications are a recipe for excessive sulfation which results in premature battery failure. Maintaining adequate battery capacity is vital for GA as your battery serves as your only source of reserve power when your charging system fails. See next question.
