Power source (safety) - Power source for loads defined as critical by applicable safety regulations. This supply must not be affected by a mains failure and is generally separate from other supplies.
Current Density - The current per unit active area of the surface of an electrode.
Critical Load - Devices and equipment whose failure to operate satisfactorily jeopardizes the health or safety or personnel and/or results in loss of function, financial loss, or damage to property deemed critical by the user.
Power factor (l) - Ratio between the active power P supplied to a load and the apparent power S supplied to said load by an AC power supply.
Self-Discharge - The loss of useful capacity of a battery on storage due to internal chemical action (local action).
Charge Control - Technique for effectively terminating the charging of a rechargeable battery.
Overdischarge - The process of discharging a cell or battery beyond its cutoff voltage and possibly into voltage reversal.