Battery charger

No,

IBat = VProg/RProg X 1200 (VPROG=1V)

750mA = 0.75A

0.75 = (1) * 1200 / R
R = 1200/0.75
R = 1600 Ohms
R = 1.6K Ohms

So you have use 1.6K ohms resistor for RProg.