A lot more people are choosing self-employment from a home office after the last round of unfavorable corporate downsizing. A home office (or telecommuting) refers to working at home using computers and other related appliances; the office often doubles as entertainment thanks to the equipment’s flexibility to play games, socialize online and so on.

A typical flashlight holds two or three cells (batteries). When these cells are placed in series or a stack, the voltage increases. For instance, a 1.5V battery flashlight: when two cells are placed in series, the voltage increases to 3V (1.5V + 1.5V).

It is important to differentiate energy efficiency from energy conservation and to be totally clear with these terms. Many people assume they mean the same thing, as they “lower the thermostat, switch off the lights and freeze in the dark”. They may even take it as “doing without”, but that is not it at all. Energy efficiency is ‘doing more with less’. It’s like saying the glass is half empty or half full; it is a matter of semantics. Hopefully, attitudes will change for the better.

You may have noticed that your home runs on either 120V or 240V instead of the 12, 24, or 48 volts a battery supplies. Off-grid homes, small holiday cottages, boats and recreational vehicles used to use 12V direct current systems but such low voltages (and DC) are only useful in very small installations. There are relatively few low-voltage appliances and wiring a low-voltage direct current system is often difficult and unviable for a typical home in full-time occupation.