Which thing/component does increase the current on same volt in the charger
To translate ohm's law to weight for easier understanding. \$V=I×R\$ => \$g = cm³×(g/cm³)\$, one is weight, one is volume, and one is density. You can't choose to have 1000 cm³ water weighing 30 kg. If you choose to have 1000 cm³ then it will weigh 1 kg, if you want 30 kg water then you will have 30000 cm³.

This is assuming water weighs 1 kg with a volume of 1000 cm³. 

I know this question will be closed within the hour, but meh, thought I'd at least elaborate on ohm's law.