batteries

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batteries

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, liquid metal battery, zinc air, CMOS battery and memory effect.

 CHARACTERISTICS OF RECHARGEABLE BATTERIESSelf                   Recharge         Dis-         Energy    Cycles    Fast   charge         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 Lot of 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.
References in classic literature ?
The frigate, immediately upon coming to an anchor, got springs on her cables, and with he guns; cast loose and her men at their quarters, lay in the circular basin of Papeete, with her broadside bearing upon the devoted town; while her numerous cutters, hauled in order alongside, were ready to effect a landing, under cover of her batteries.
By a pretty maneuver two of the vessels of Helium gained a position above their adversaries, from which they poured upon them from their keel bomb batteries a perfect torrent of exploding bombs.
Sir William Howe made preparations to cross over in boats and drive the Americans from their batteries, but was prevented by a violent gale and storm.
And Porthos, whose eyes this reply of his friend's had at last opened, or rather thickened the bandage which covered his sight, went with his best speed to the batteries to overlook his people, and exhort every one to do his duty.
When, half suffocated, I raised my head above water, the Martian's hood pointed at the batteries that were still firing across the river, and as it advanced it swung loose what must have been the generator of the Heat-Ray.
But he was attracted by the cleverness of the boys and gave them money to buy more wires and more batteries.
It reduced the cost of batteries and put them in charge of experts.
As the final result of all these varying changes in switchboards and signals and batteries, there grew up the modern Telephone Exchange.
The review ended in a glorious chase across the plain - batteries thundering after cavalry to the huge disgust of the White Hussars, and the Tyneside Tail Twisters hunting a Sikh Regiment till the lean, lathy Singhs panted with exhaustion.
Without demur and without question, fast as tonga could fly or pony gallop, back to their Regiments and their Batteries, as though they were hastening to their weddings, fled the subalterns.
In maneuvering for position they were continually fouling one another, and on two occasions shots from our batteries came near to striking our own ships.
If we do not open up our batteries on you again and kill you all, you will simply drift about the sea helplessly until you die of thirst and starvation.