From Jay M. Pasachoff
In your eco-questions and answers, your discussion of how best to charge a laptop left a major topic unanswered: what if you use the laptop as a main computer, normally just plugged into the mains – or “to the wall” as we say in the US (15 November 2008, p 36)? Is it better to keep unplugging it and using it until the battery runs down, or to leave it plugged in all day, or even for weeks on end?
The editor writes:
• To minimise bills, charge the battery and use it until it’s empty.
Pasadena, California, US
