I was thinking along the same lines as pacemaker . You can use a thermocouple or thermovoltaic cells to generate electricity . I never really thought it cost effective , but I think it might be possible to deal with the heat . Maybe a laptop would be more appropriate . But the amazing part would be the 80 year half life . I guess these days it ' s not that big of deal to have a device that never needs charging , but it ' d be nice . <| sep |> I ' d love to see some of them take on Rousey , Holm , or cyborg . <| sep |> Guys . No . This is no nest bullshit . Take a good look at this guy . He has no tail feathers , and his wings are likely clipped . This is common for people who wanna have a bird pet who can ' t fly . He is trying to fix himself . This is sad .