https://ntrs.nasa.gov/citations/19810012995
Viking lander five year summary - NASA Technical Reports Server (NTRS)
The battery assemblies in the Viking lander are discussed. Discharge and recharge schemes are described. Performance charts for the batteries are included.
nasa technical reports serverfive year summaryvikinglander
https://dspace.lib.hawaii.edu/items/8fb13ab7-a9da-472a-8537-45020a1cd401
Summary Report of 2015 Five-Year Review Completions
summary reportyear reviewfivecompletions