Fig. 3. The radiated power of the miniature transmitter (larger crystal, 13 cm antenna) relative to the mass of attached silver-oxide cells. There is a marked increase from 4.8 µW with the smallest 337 cells (0.12 g) to c. 29 µW on a 076 battery (2.3 g). Fit: y=-1.343+19.331x^0.538, r²_adj=0.82, N=43.