Support for dumb devices would rely on users letting Clouttery know whenever they change the batteries or recharge the device. Of course, this only works for devices with more or less constant battery draw. For example, if it's a 3DS you rarely use and just sits in a shelf, then Clouttery would often get its battery level guess right, and could remind you to charge it when the battery gets to 40% or so (adjustable, ofc). But if you begin using it more often all of a sudden, for a while Clouttery's estimate will be off by a lot.
Similarly, if you use it every day for a bit, say, you spend 20% of the battery each day, then that is a approximately constant battery draw too, and Clouttery will catch on the fact that the battery goes empty every five days. Of course, with these devices it wouldn't be possible to notify the user when charging completes.
This feature really would work best with "set and forget" devices that are always on, like smoke alarms, wall clocks, watches, room thermometers and weather stations. It could also work well for low-power devices that are randomly used and thus use energy randomly, but have a constant draw when analyzing large time periods: remote controls, emergency/presence lights and doorbells. Finally, it should also work well with devices that are very rarely used but have batteries always put on for whatever reason (which will naturally lose charge by themselves as time goes) - pocket radios, flashlights, etc. It could be of use to people with large collections of calculators, iPods or whatever which they obviously aren't always using (but you should take out the batteries if possible, then. And the iPods could go to a museum
![Grin ;D](Smileys/cwsmileys/biggrin.gif)
).
Clouttery wouldn't care what type of "dumb device" it is, all it wants to know is how often the batteries need to be charged or changed and the last time you did it. It would then assume a constant power draw and let you know when the guesstimate of the battery level gets down to a certain value, which could be zero for alkaline batteries, or something higher for rechargeable ones of the kinds that don't like full discharges.