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Uses
 
Uses
 
*Provides power to circuits. At any time the power is equal to the voltage of the battery times the current. When the battery is not connected, the current and the power are 0.
 
*Provides power to circuits. At any time the power is equal to the voltage of the battery times the current. When the battery is not connected, the current and the power are 0.
*We will often use a wall-powered power supply in place of a battery.
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*We will often use a power supply in place of a battery.
  
  
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Also the process of charging them up.
 
Also the process of charging them up.
 
Is it true that "almost all batteries don't perform to optimum until after 10 or so full charging cycles"?
 
Is it true that "almost all batteries don't perform to optimum until after 10 or so full charging cycles"?
 
== battery holder ==
 
 
With many modern electronic devices, the battery is often the single heaviest component, and one of the largest parts.
 
Also, it is often the only part designed to be replaced periodically.
 
 
* coin cell battery holder: Are you designing or soldering a PCB and you need battery backup? [[PG31 GPS USB Dev Board]] has a few tips. The µWatch [[uWatch]] takes a completely different approach to connecting coin cells to its PCB.
 
* 9 V battery holder: ... ''any tips?''
 
* AA battery holder: ... ''any tips?''
 
* ''What kind of battery and holder is appropriate for powering a sewn-on [http://hlt.media.mit.edu/?p=34 LilyPad Arduino] or [http://web.media.mit.edu/~leah/grad_work/diy/diy_tank.html wearable LED display] or other sewn-on wearable electronics?''
 
 
  
 
== battery test jig ==
 
== battery test jig ==

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