That would be cadmium ( the "cad" in NiCad"). It is in the same group as zinc, and so will have similar chemical properties.
Cadmium (Cd) is the close relative of zinc and is used in combination with nickel to make nickel-cadmium (Ni-Cd) rechargeable batteries. These batteries are known for their high energy density and ability to be recharged multiple times, making them popular for various applications such as in portable electronics and power tools.
lithium ion
They reduce the use of metal used to make them. (i.e. when you get disposable batteries the metal is disposed) but if you recharge batteries, it will reduce the costs of making.
Mercury is commonly used in Cell Phone and Laptop batteries.
A kin is a close relative who shares a bloodline with a person. So genji took a blood relative with him.
Hydrometers test specific gravity in a liquid/relative density they are used for anti freeze, batteries etc. They also test the buoyancy of water.
A pen is a close relative to the pencil and is also used in our everyday lives.
Nickel is used for making stainless steel, cionage, armor plating, ceramics, magnets, and batteries.
these are rechargeable batteries used in cell fones
Plutonium is not used in batteries.
in inverter batteries
18650 batteries are batteries that can be used for many various activities. Just like your AA or AAA batteries, you can use these for various things too.