Like most other applications that are still powered conventionally, if they are not charged, they will not work and there goes your sustainability initiative. It has to be wondered why, in most cases, one of the most used portable devices in modern cultural and commercial history has yet to receive this treatment. Your cellphone or smart mobile is on and being used for the best part of the day. And there are very few people these days that actually turn off the device at night before they go to bed.
Whether the phone is on or off, it is a good time to charge it. The latest devices only require a few minutes of charging so that is fortunate in cutting done on electricity use. And that is the question being asked. Why not have a battery and a charger that requires no use for electricity? That would be more than sustainable, surely. Many commercial businesses are slowly but surely realizing the value of powering their operating tools, where it is possible to do so, by battery.
But in order to ensure that the battery can continue running and possibly enjoy a longer than average lifespan, a commercial battery charger will most certainly be required. Long life or not, if the battery is not supported by its charger, it will have no life. And if the battery has no juice as a result, then life as it is known for the device or machinery run by it, will also come to a standstill. Unless, of course, it can still get away with an electrical outlet.
Either way, that is hardly sustainable. So to end this note, it is plain to see that every sustainable initiative still needs its charger if you will.