Chargie
Chargie is the only charging manager that can physically halt the charging process at your chosen percentage (the lower, the better), so that the battery will actually outlast the phone.
This will allow you to recycle your device by donating it to someone in need (grandma, elder, kid etc) so that its carbon footprint is greatly reduced… More here.
Interesting idea. I’m not 100% convinced, but it has potential.