Whats the difference between NiCad and LED batteries?

[mrivc211]

From what I understand-
Nicad will give you continuous power till the battery dies, and LED will give you less power as it weakens.

Anyone care to add or confirm?

 

[C650CPT]

The biggest difference is the price. I can't give you numbers but I know the Nicads are very very expensive.

Another difference is with Nicads you can have thermal runaways but not with Lead acid batteries.

 

[JEP]

With the NIcad batteries they can recharged at anytime w/o damage to the battery. Whereas the others need to be completly drained before recharging,m If you recharge a battery that was not drained, it will damage its ability to hold a charge.

 

[Flying_Corporal]

Are you preping for an interview? All questions seem to come from the interview gouges

 

[jergar999]

Nickel-Cadmium batteries tend to put out a constant power right up until they die. The amperage and voltage (particularly important for starts) will remain high for a certain period and then drop like a cliff. Thermal runaway is a condition in which the battery will no longer put out power but continues to recieve a charge from either generators or alternators. Since all this energy is being absorbed and not put out it becomes heat. The hotter a battery is the more difficult it is to put out power, so the condition worsens if it continues to receive a charge. Almost any aircraft with NiCads is equipped with a battery temperature guage and many also have an associated annunciator warning light. The location of a hot battery could be very critical, as many are housed in the wing or wings. Lead-Acid batteries differ in that they take a charge without absorbing as much heat. The voltage and amperage they put out declines very slowly over a long period of time, as the reaction between the Lead (or a substitute metal) and electrolyte (acid) weakens. Voltage and Amperage (specifically cranking amperage) become critical in turboprop engines where airflow is everything and a faster start is a cooler one.