1. Maintenance-Free Batteries: Lead–Acid, Nickel/Cadmium, Nickel/Metal Hydride: A Handbook of Battery Technology;Berndt,1993
2. Lead–Acid Batteries;Bode,1977
3. Standby Battery Requirements for Telecommunications Power;May;J. Power Sources,2006
4. Lead-Acid Batteries: Science and Technology;Pavlov,2011
5. Valve-Regulated Lead–Acid Batteries;Rand,2004