Top-Up Charge - A low rate charge following the main charge, designed to ensure maximum capacity.
Current Density - The current per unit active area of the surface of an electrode.
Trickle Charge - A charge at a low rate, balancing losses through local action and/or periodic discharge, to maintain a cell or battery in a fully charged condition.
Wall-less Design - A battery design where the structural support for the cells is formed by an open plastic framework.
Safety installation - Installation supplying electrical equipment which may have a direct effect on the safety of users and must therefore remain energized even in the event of a mains failure. In general, characteristics concerning the power supply and conditions for transfer to the safety source for such electrical equipment are covered by applicable regulations.
Voltage Depression - An abnormal drop in voltage below expected values during the discharge of a battery.
Charge Control - Technique for effectively terminating the charging of a rechargeable battery.