Li-ion (Lithium Ion) batteries are the next newest type rechargeable battery in which lithium ions move from the negative electrode to the positive electrode during discharge and back when charging.

Also, Ni-MH batteries cost more than Ni-Cd batteries, but their longer life tends to more than compensate for that. On the downside, Ni-MH batteries discharge more when not in use than Ni-Cds.Īfter about a week of not being used, a fully charged Ni-MH battery will have lost about 20% of its charge. Their typical useful life is more like 3 to 4 years. There is some memory effect with Ni-MH batteries, but not nearly as much as with Ni-Cd.Īlso, they can go through more discharge-recharge cycles than Ni-Cd batteries. However, they suffer much less from the memory effect than Ni-Cd batteries. They have many of the same advantages that the Ni-Cd batteries have. Ni-MH (Nickel-metal hydride) Batteries are a more recent development in rechargeable batteries. The major Disadvantage of Ni-Cd batteries is the memory effect (The decreasing useful time between charges for a rechargeable battery is due to what is called the memory effect).Īlso, Ni-Cd batteries can only undergo a limited number of discharge-recharge cycles before they need to be replaced. They have a good capacity and hold a very stable voltage between charges as they are being discharged.

Ni-Cd Batteries have been around the longest of these three types.

Ni-Cd battery has nickel oxide hydroxide and metallic cadmium as electrodes. Ni-Cd cells have a nominal cell potential of 1.2 volts (V). Let us have a look at different types of rechargeable batteries. These batteries look similar from outside but there are significant differences between them. Rechargeable batteries are of four basic types: