Yep. This type of battery is most famous for suffering from the memory effect, which is one of the reasons for why NiMH batteries have largely replaced them.
All rechargeable batteries develop a "memory effect", which occurs over time. This effect limits the ability of the battery to recharge close to its fullest potential charge. How quickly this problem manifests itself can directly depend on the discharge/charge cycle of the battery during its lifetime. It is always best to discharge a battery completely - or close to it - before recharging it. NiCAD and NiMH are older types of batteries where NiMH had more resistance to the "memory effect" than NiCAD. Hence, NiMH was a breakthrough in battery technology once upon a time. Now we have LiION batteries that are a major improvement over the NiMH batteries.
NiCad batteries use nickel and cadmium, while NiMH batteries use nickel and metal hydride. NiMH batteries have higher energy density and are more environmentally friendly than NiCad batteries.
Nicad is short for nickel-cadmium
That is nicad, pertaining to batteries.
Yes,
Typical D cell batteries NiCad or otherwise are 1.2 volts.
Nicad batteries have sodium hydroxide electrolyte. Citric acid powder will neutralize it.
NiCd Nickel & Cadmium
You cannot do that. When dead, they are gone for good.
When you buy lithium polymer batteries, you can do so with the knowledge that they do not have the dreaded memory effect. This new technology is much better than the batteries that used to be used in computers, phones, and the like. These batteries would remember how full they were when you plugged them in, and they would count that as being empty, even if they were not. The lithium polymer batteries do not do this.
In NiCad batteries the negative electrode is made of Cadmium, while in NiMH batteries it is made of an intermetallic compund, consisting of a rare earth (such as Lanthanum or Cerium) and a transition metal (such as Manganese or Nickel). anonymous@oola.com
Rechargeble batteries have a limited lifetime. If you have had the battery more than a year or so, or if you subject it to frequent charge/discharge cycles, then you need a new battery. If the battery is relatively new, and you have this issue, there might be something wrong with either the charger or the phone. Sometimes, the designer of the charger "gets it wrong". One problem with NiCad batteries is that, if you overcharge or overdischarge them they get damaged. While this effect may be reduced in the LiPo battery the Ericson uses, the technology still has its problems. Another problem with the NiCad, and possibly the LiPo, is that the charger must be able to see the slope of the voltage over time exhibit a change in order to detect the battery full condition. Voltage alone is not necessarily an indication of charge state. If you charge the battery constantly, or repeatedly after small discharge, the charger can get confused and over charge the battery. The anecdotal mythology surrounding NiCad battery's tendency to have "memory" failure is just that - mythology. The truth is that NASA did experience memory problems with NiCad batteries in low earth orbiting sattelites, but that was a very limited, very controlled, observation. The bigger truth is that NiCad batteries have limited lifetime, and they can be damaged by overcharging and undercharging. They will often reach the cycle limit well before the so called "memory" limit.