No they don't.
Electrical batteries don't contain silicon.
Yes, MacBook chargers contain lithium batteries.
No, there are only atoms, electrons and chemicals in a battery. And there are many of these types of things in bigger batteries.
No, a magnet will not affect a battery.
Batteries doesn't contain actinium.
They contain Sulfuric Acid.
Common automobile batteries are Lead/acid (dilute sulphuric acid) batteries.
Electricity can be produced by various methods such as generators, batteries, and solar panels, which can then be used to power a magnet.
No, modern batteries do not contain mercury. Mercury is a toxic material and is no longer used in most consumer batteries due to environmental and health concerns.
Most car batteries contain Sulphuric acid.
Some batteries do contain mercury but only specialised ones.
Yes, some electric can openers contain a magnet to keep the lid from falling to the counter when the can opener cuts if off.