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For a real battery the exponent is greater than unity, and capacity decreases as discharge rate increases. For a lead–acid battery k {\displaystyle k} is typically between 1.1 and 1.3. For different lead–acid rechargeable battery technologies it generally ranges from 1.05 to 1.15 for VRSLAB AGM batteries , from 1.1 to 1.25 for gel , and ...
Low self-discharge nickel–metal hydride battery: 500–1,500 [14] Lithium cobalt oxide: 90 500–1,000 Lithium–titanate: 85–90 6,000–10,000 to 90% capacity [47] Lithium iron phosphate: 90 2,500 [55] –12,000 to 80% capacity [63] Lithium manganese oxide: 90 300–700
the fraction of the battery's capacity which is currently removed from the battery with regard to its (fully) charged state. For fully charged batteries, the depth of discharge is connected to the state of charge by the simple formula =. The depth of discharge then is the complement of state of charge: as one increases, the other decreases.
A lithium-ion or Li-ion battery is a type of rechargeable battery that uses the reversible intercalation of Li + ions into electronically conducting solids to store energy. In comparison with other commercial rechargeable batteries, Li-ion batteries are characterized by higher specific energy, higher energy density, higher energy efficiency, a longer cycle life, and a longer calendar life.
A high cut-off voltage is more widespread than perhaps assumed. For example, a certain brand of mobile phone that is powered with a single-cell Lithium-ion battery cuts off at 3.3 V. The Li‑ion can be discharged to 3 V and lower; however, with a discharge to 3.3 V (at room temperature), about 92–98% of the capacity is used. [2]
The higher the discharge rate, the lower the capacity. [50] The relationship between current, discharge time and capacity for a lead acid battery is approximated (over a typical range of current values) by Peukert's law: = where is the capacity when discharged at a rate of 1 amp.
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