====NiCd rechargeable (nickel cadmium)====

====Positive characteristics====

•	Extremely high current output - low internal resistance - high conversion efficiency (65%).


•	Not much capacity loss under heavy loads (little to no Peukert Effect).

•	Very level output voltage curve, holding very steady at 1.2V until almost flat.


•	Can be recharged many times (500-1000) if maintained properly.


•	Copes very well with abuse such as heavy loads, deep discharge, etc, if maintained properly.


•	Can be stored in any state of charge.



==== Negative characteristics====

•	Cadmium is bad for the environment.


•	Cells exhibit voltage depression ("memory" effect) if recharged from a less than completely flat state (ie, they go flat before they should).


•	Must not be over discharged.


•	Reduced capacity with increased temperature (20% with each 8°C).


•	Careful handling required because of high current output - don't carry in your pocket, especially with a set of car keys.