Reliable: To be dependent; to have confidence based on experience; dependable, giving the same result on successive trials.
Convenient: Suited to personal comfort or to easy performance; suited to a particular situation; affording accommodation or advantage; being near at hand. From Latin convenire to assemble, come together, be suitable.
Some products are designed for use in adverse conditions. These include batteries, automobiles, tires, outdoor work clothing, footwear. These products enable people to accomplish tasks like living in extreme climates, driving to work in adverse weather, and staying comfortable while working outside. American made products in these categories are designed to be reliable, as this prevents surprises and gives the user a sense of security about using the product.
General Motors often uses the tagline “Longest–lasting, most dependable truck on the road” to describe its Chevy truck line. Other major truck companies like Ford or Dodge also use words like reliable and dependable to describe their trucks. Another famous series of commercials from battery maker Energizer involved a battery-powered rabbit playing the drums as if in a marching band. This rabbit was known as The Energizer Bunny, and his characteristic was that he „kept going and going and going.“