Compaq Presario C540, C540EA, C542, C542EA, C551, C551NR, C551TU, C552, C552CA, C552TU, C552US, C553, C553TU, C554, C554TU, C554US, C555, C555EA, C555EM, C555EU, C555TU, C556, C556CA, C556TU, C557, C557CL, C557TU, C558, C558TU, C559, C559TU Series AC Adapter (Power Supply)