Nickel cadmium (NiCD) and Lithium batteries are both used in electronic devices and light duty mechanical tools as a source of power to keep these devices running.
Everyone is dependent upon the convenience of cordless power tools. The fact is that a cordless tool is only as reliable as its rechargeable battery. The moment when the battery cannot hold a charge, it is dead and useless.
If you are thinking of saving money, you can do this with the help of lithium-ion batteries having all the shapes and sizes. The lithium batteries develop memory or have low self-discharge.
Nowadays, the approval process is getting tough to release a new product in the pharmaceutical industry. The new rules have come up that increases the costs of the manufacturing unit and have complicated process.
Generally, a 20 % decrease in the time that the battery can be used, before it requires charging, it is seen as the point where the capacity decrease becomes an issue.
Most power tools on the market nowadays are not designed to know how to distinguish between the power from a NiCad battery and the power coming from a Lithium ion battery.
For many years the NiCad batteries have been dominating the cordless market. There was almost no cordless device that contained any batteries other than the NiCad ones.