List of battery types

Following is a summary of the characteristics of popular battery technologies. For more details, see lead acid, nickel cadmium, nickel metal hydride, lithium ion, lithium polymer, zinc air, CMOS battery and memory effect.

 CHARACTERISTICS OF RECHARGEABLE BATTERIES

                    Recharge          Self
          Energy    Cycles    Fast  Discharge
          Density   To 80%   Charge   Per
 Type     (Wh/Kg)*  Capacity  (hrs)  Month

 Nickel
  Cadmium   45-80     1500     1      20%

 Nickel Metal
  Hydride   60-120   300-500   2-4    30%

 Lithium
  Ion      110-160   300-500   2-4    10%

 Lithium
  Polymer  100-130   300-500   2-4    10%

 Lead Acid   30-50   200-300   8-16    5%

                     To 50%
                     Capacity
 Reusable
  Alkaline    80       50      2-3    0.3%


  Data courtesy of
  Cadex Electronics Inc. (www.cadex.com).

  * Wh/Kg = watt hours per kilogram

A Whole Lotta Batteries

This roomful of lead acid batteries stands ready to drain itself entirely in less than a minute. It serves as interim power for a large datacenter between the time a power outage has been detected and the generators can come up to full speed.

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