Answer:
Quick as a heartbeat, lives long like (insert Nokia ringtone here)
Step-by-step explanation:
You could say you are advertising a new computer that boots up and loads really fast, as fast as your heart beats. (Use the sound effect of a heartbeat, or record yourself tapping your chest in the same rhythm that Pentatonix taps at the beginning of White Winter Hymnal).
It also has a long battery life, like the Nokia phone. (Use the Nokia ringtone sound effect. Recreate it with an instrument or piano app. Music notes found in the video "Nokia tune - piano sheet music ". You can use the last two bars of music. Using the actual ringtone may lead to copyright issues).
The slogan uses similies by comparing with like/as.
Name of product:
Most computers seem to have names that include random letters and numbers. Maybe your computer can use the letters "bpm" (like your username) because it's associated with heartbeats.
During the commercial you may choose to show an animal with a really fast heart rate and compare it to your computer. You could also compare it to an animal with a long lifespan.
You will need to show your computer at one point, probably booting up.
You could show the audience that the battery life of the computer is very long by showing a clock sped up fast while the computer is left on.
At the end of your commercial, you can show a snippet of an electrocardiogram (the heartbeat lines) and play the heartbeat sound effect.