Lithium batteries are not the same as Lithium Ion (Li-ion) batteries. Lithium is the lightest of all metals and contains the best electrochemical potential.
The issue with Lithium batteries is, even if they get hot, they have a propensity to burst and start a flame.
If you want to know more about lithium-ion batteries then you can pop over to rechargeable lithium ion battery.
The initial work on the lithium-ion began in 1912 with a guy called G.N. Lewis.
From the early 1970's first non-rechargeable lithium-ion batteries became accessible.
Efforts to manufacture rechargeable lithium-ion batteries from the eighties failed due to security concerns. They discovered that intermittent shorts out of lithium dendrites can induce thermal run-away. When recharging a lithium ion battery that the temperature immediately approached the melting temperature of the ion that led to violent reactions.
Back in November 2, 2005 a firm named A123Systems, developer of a new production of electrons that were senile, unveiled it has technology and declared that it is delivering batteries with unparalleled power, security, and life when compared with traditional Lithium technology.
Black & Decker is A123Systems first client to utilize the Li-ion battery in cordless tools. Black & Decker is utilizing A123Systems 36 volt Li-ion battery at the DeWalt line of cordless tools. The DeWalt line using all the 36 volt Li-ion Batteries incorporate a hammer drill, reciprocating saw, circular saw, impact wrench, rotary hammer, jigsaw, flashlight and mix kits.