A method for analysis of a sample includes directing a beam of radiation to impinge on a target area on a surface of the sample along a beam axis at a plurality of different elevation angles. The rechargeable battery pack can comprise a second battery supplemental to the first battery, an external power input configured to couple to an external power source, a power output for powering the electronic device. The die includes a front surface; a back surface on an opposite side of the die than the front surface; and a through-silicon via exposed through the back surface of the die.