We are planning an MFC-based mobile phone charger develop  says Aiden Our goal is a charger would to cost a dollar and could fully charge a phone number in 24 hours is also  unlike solar panels  require no precious materials: they in a few minutes in minutes as cultural knowledge of MFC technology spreads  Africans will be able to mount their own chargers almost entirely from scratch  and with minimal cost recouped in recouped in the back