This glossary of technical terms is designed to help you understand the frequently used terms within the battery industry. 

【The Glossary of Technical Terms in Battery Industry】
This glossary of technical terms is designed to help you understand the frequently used terms within the battery industry. 
•【Drain】
-The withdrawal of current from a battery.
✔Parasitic drain:
-when power continues to be drained from a battery after the vehicle engine is off. 
•【Electrode】
-Positive or negative plate containing materials capable of reacting with #electrolyte to produce or accept current. 
•【Electrolyte】
-Conducts ions in a cell. such as lead acid batteries use a sulfuric acid solution.
•【End of Charge Voltage】
-The voltage reached by the #cell or #battery at the end of charge, while the charger is still attached. 
•【Energy Density】
Ratio of battery energy to volume or weight expressed
in watt-hours per cubic inch/mm or pound/kilogram. 
•【Gas Recombination】
-The process by which oxygen gas generated from the positive plate during the final stage of charge is absorbed into the negative plate, preventing loss of water. 
•【High Rate Discharge】
-A very rapid discharge of the battery. Normally in multiples of C (the rating of the battery expressed in amperes)
•【Hydrometer】
-Device used to measure the specific gravity of a fluid, reads state-of-charge of flooded lead acid batteries
•【Impedance】
-The resistive value of a battery to an AC current expressed in ohms (Ω). Generally measured at 1000 Hz at full charge. 
•【Internal Resistance】
-The resistance inside a battery which creates a voltage drop in proportion to the current draw.
•【 #LithiumIonBattery】
- #Rechargeable battery with cobalt, manganese, iron and/or other metals as cathode and #graphite anode.
•【Negative Terminal】
-The terminal of a battery from which electrons flow in the external circuit when a battery discharges. 
•【Positive Terminal】
-The terminal of a #battery toward which electrons flow through the external circuit when the cell discharges. 
•【Nominal Capacity】
-The nominal value of rated capacity
•【Nominal Voltage】
-The nominal value of rated voltage
•【Rated Capacity】
-The capacity of the cell expressed in amperes. Commonly, a constant current for a designated number of hours to a specified depth of discharge at room temperature.
•【Open Circuit Voltage】
-The voltage of a battery or cell when measured in a no load condition.
•【Overcharge】
-The continuous charging of a cell after it achieves 100% of capacity. #Batterylife is reduced by prolonged overcharging.
•【Parallel Connection】
-Connecting a group of batteries or cells by linking all terminals of the same polarity. This increases the #capacity of the battery group. 
•【Series Connection】
-The connection of a group of cells or batteries by linking terminals of opposite polarity. This increases the #voltage of the battery group.