FieldSpec 4, LabSpec 4, TerraSpec 4 manual addendum

Addendum to FieldSpec 4 Field Guide (MAN0626-01-EN), LabSpec 4 Basic Guide (MAN0654-01-EN) and TerraSpec 4 Quickstart Guide (MAN0613-01-EN).

Contains updated battery handling instructions and charger details for the NiMH battery.