Battery Sizing and Battery Chargers

Batteries
Alcad tool for sizing batteries based on your profile - this is very useful. There is another battery company that has something similar to this and that lets you mix constant current, constant power, and linear load together but it escapes me.

SBS Batteries

Battery Chargers
Hindle Power - Battery Chargers

Literature and Standards
IEEE 450 Recommended Practice for Maintenance, Testing, and Replacement of Vented Lead-Acid Batteries for Stationary Applications

IEEE 485 Recommended Practice for Sizing Lead-Acid Batteries for Stationary Applications

IEEE 1115 Recommended Practice for Sizing Nickel-Cadmium Batteries for Stationary Applications

IEEE 1106 Recommended Practice for Installation, Maintenance, Testing, and Replacement of Vented Nickel-Cadmium Batteries for Stationary Applications