To overcome the drawback of constant voltage charging, a technique is employed where a resistor is connected in series between the battery charger and the battery. This arrangement allows for fine-tuning of the charging current during the initial stages of charging. However, in some cases, the maximum charging current is restricted. As a result, as the battery voltage gradually increases during the charging cycle, the current nearly declines linearly. For reducing outgassing, a practical approach is to use two resistance values, around 2.4V, which allows for a smooth switch from low resistance to high resistance mode.