See PDF table, under voltage state battery voltage < 2.9V, the charging current is 1\/10 of the set current, i.e. (1\/10×Ibat) Ibat=1100\/Rprog; Charging status 2.9V< Battery voltage 4.2V, the charging current is Ibat (at this time the constant current state current is Ibat); Trickle charging state voltage to 4.2v constant voltage charging, charging current drops to 10% of the set current stop charging; The voltage drops below 4.02V and switches to the charging state. When the current is constant, the voltage will change. For example, charging will slowly increase from 2.9V to 4.2V.
Constant voltage state voltage is unchanged, the current will change, such as trickle current will slowly reduce to 10%Ibat, want to know the specific value can be measured.