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The Power of Not Charging

Next to my desk at work I have a fine collection of photos of power sockets from homes and offices around the world - the result of rummaging around under desks, peering behind cabinets and following cables to their source. In user studies I'm always intrigued to see how people tackle the problem of keeping their mobile phone charged - after all a phone without power is largely useless as a tool for solving life's little emergencies, and above everything else this is the reason that people consider the phone a mobile essential.

It is possible that technologies such as bistable displays will means that devices will have functionality without power, but for now our daily/weekly rituals include remembering to charge, and once charged - remembering to take the object when next leaving home. But does it need to be this way?

In the near term usage patterns will change when the two or so hours it currently takes to charge your laptop/phone/iPod is shortened to 10 or 20 seconds. That's a sufficiently short time to be able to pause a conversation and top up power if it were applied to a communication device, for example using fuel cell or capacitive charging.

The challenge of keeping electrical devices powered up can be tackled from a number of different directions. It's possible to make a mobile phone which has sufficient power to last as long as the device itself. The obvious (but wrong) starting point is a massive battery/fuel cell pack - it would make the product impractical to carry and the consumer market impossibly small. The opposite approach has potential - shortening the lifetime of a mobile phone to last as long as today's battery life. This is not as far fetched as it may first seem considering use cases around mobile phones bought from vending machines, a method for storing personal data off the device, combined with a system for recycling and re-circulating 'used' products to new users. As with most tasks (except entertainment and bodily functions) delegation is another solution - simply delegate the act of remembering to charge a device to someone or something else. Asimo needs something to do whilst you're sleeping right?

Usage patterns are currently constrained (or in some ways anchored) by the need to leave a device in a fixed location for a length of time. As that length of time is drastically shortened, or indeed eliminated our current notions of how we charge objects will all seem rather quaint.

Writing from back of | January 12, 2006 | Permalink