Here is a definition of what alternating current and Direct current is. Here are also some comparisons between the two types on electrical power.
This is what will happen if the internet was never invented. Some things will never be the same.
Here is a comparative description and list of differences between lithium ion (li-ion) and nickel-metal hydride (NiMH) batteries.
Here is a technique to fix Firefox's memory usage problems.
Here are ways to extend the service life of a standard NiMH battery Cell. And here are some Tips to prevent NiMH battery degradation.