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It is well-known that used batteries pollute the environment.They are straggled in time and space,that is very hard for recycling.
Maybe try to use this design to achieve the recovery.Hanging such a street lamp in front of each house. Depositing the used batteries into it,that make Lcd light.
When the Lamp memory is full,
environmentalists will remove them.
Feifei Yu ;Maolai Guo