The battery 667 Materials in the battery 668 Battery construction 668 Chemical actions in the battery 669 Lowmaintenance and maintenancefree batteries 671 Battery voltage 671 Battery specifications 671 Battery testing 672 Battery charging 674 Care of batteries in stock 675 Battery maintenance 675 Battery faults 677 Battery safety 678 Use of jumper leads 678 Technical terms 680 Review questions 680