Battery Category 
The electrochemical characteristics of the choice of the internal battery can be charged battery possibility. We died to not be referred to as a battery rechargeable batteries, rechargeable batteries and claimed as a secondary battery. There are often common primary battery zinc-manganese batteries, silver-zinc batteries, lithium manganese dioxide batteries. Collect the secondary battery nickel-cadmium batteries, nickel hydrogen batteries, lithium ion batteries, lithium polymer batteries, lead-acid batteries. 
Analysis of battery-related terms 
Charge rate (C-rate) 
C is the first letter Capacity, used to disclose the size of the current value display battery charge and discharge. 
For example: a rechargeable battery rated capacity when 1100mAh, revealed that displayed 1100mA (1C) sustainable one hour discharge time, as to 220mA (0.2C) discharge time of Sustainable 5 hours. 
Termination voltage (Cut-off discharge voltage) 
Means the battery discharge when the voltage drops to a minimum obligation is not appropriate to continue to discharge the voltage of the battery. 
According to the type of battery and substandard substandard discharge premise of the battery capacity and lifetime requirements are not together, so polite discharge termination voltage lithium batteries is also not the same. 
Open circuit voltage (Open circuit voltage OCV) 
When the battery is not discharged, the potential difference between the battery terminals are called open circuit voltage. 
Open-circuit voltage of the battery, according to the battery positive and negative material varies with the electrolyte, the battery is assumed that the positive and negative materials are entirely the same, no matter how big the size of the battery, how to alter the geometry of the open circuit voltage are the same. 
Depth of discharge (Depth of discharge DOD) 
In the process of battery use, the percentage of its rated capacity of the battery capacity release, called the depth of discharge. 
Depth of discharge of the secondary battery charging irregularities have a deep relationship life, the deeper the depth of discharge when the secondary battery, the shorter the charge life, and therefore should avoid the use of depth of discharge. 
Over-discharge (Over discharge) 
If the discharge process of the battery, the battery end voltage value across the discharge, the pressure within the battery can be configured to continue the further discharge, the positive and negative electrode active material reversibly damaged, the onset of the battery capacity to add clarity. 
Overcharge (Over charge) 
Battery charging, full of shape upon arrival, if still continue charging the battery can lead to hypertension, battery deformation, or leak occurs, the function will clearly reduce the battery and damage. 
Energy density (Energy density) 
Per unit volume or mass of the release of energy of the battery. 
In the same volume under the superficial energy density lithium-ion battery is nickel-cadmium battery 2.5 times, 1.8 times the nickel-metal hydride batteries, so in the case of equal capacity battery, the lithium-ion battery will be higher than nickel-cadmium, nickel-metal hydride batteries smaller and lighter. 
Self-discharge (Self discharge) 
Regardless of whether the battery is in the use of shape, because all kinds of notices, the presence of power loss Rhyme loss phenomenon. 
If in one month, then the accounting units of lithium-ion battery self-discharge is about 1% -2%, nickel hydrogen batteries self-discharge approximately 3% -5%. 
Life cycle (Cycle life) 
Experience a rechargeable battery charge and discharge process, known as a reincarnation or called a cycle. Before charge and discharge at a certain principle, the battery capacity drops to a value manners, the number of rounds can withstand the battery, the cycle life of the rechargeable battery is called. The cycle life of this world is said to charge the battery at full charge and full discharge use, the battery capacity decreased to 60% of the number of reincarnation when the initial capacity. 
Memory effect (Memory effect) 
In the battery charge and discharge process, the plates will attack a lot of small bubbles in the cell, a long time, these bubbles will increase the area of ​​the battery plates, but also directly affect battery capacity. In the process of using batteries, any one incomplete discharge Rhyme enhance memory effect, so that the quality of the battery capacity becomes lower.