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Droid and Asus power drawn is similar owing to capacity of battery being similar, whereas Nobis capacity is nearly double compared to Droid,so it seems fine and there is no need to "force" more current to be drawn. Doing so will result in poor battery performance. Simply put, forcing the battery to charge faster by increasing the current will result in a battery that discharges faster. This is covered in my answer and in the Battery University link above

** I do not recommend options 1 and 2 for reasons mentioned in my answer. Option 3 is safer by comparison but needs to be cautiously tweaked and you need to understand the risks.

1. Don't use power intensive apps while charging. Reasons

2. Get the right combination of chargers and charging cables by measuring current with Ampere or 3C Battery Monitor Widget to rule out charger cable problems resulting in low charging current.

3. If you are replacing charger cable, go in for a shorter thicker cable (24/ 28 awg) rather than longer, thinner cables as the former offer less resistance to current

4. Cleaning the charging port of your device by blow drying it to dislodge lint or dirt that does accumulate when your phone is in pocket or outdoor usage (they cause poor connection and increase resistance )

Droid and Asus power drawn is similar owing to capacity of battery being similar, whereas Nobis capacity is nearly double compared to Droid,so it seems fine and there is no need to "force" more current to be drawn. Doing so will result in poor battery performance. Simply put, forcing the battery to charge faster by increasing the current will result in a battery that discharges faster. This is covered in my answer and in the Battery University link above

** I do not recommend options 1 and 2 for reasons mentioned in my answer. Option 3 is safer by comparison but needs to be cautiously tweaked and you need to understand the risks.

1. Don't use power intensive apps while charging. Reasons

2. Get the right combination of chargers and charging cables by measuring current with Ampere or 3C Battery Monitor Widget to rule out charger cable problems resulting in low charging current.

3. If you are replacing charger cable, go in for a shorter thicker cable (24/ 28 awg) rather than longer, thinner cables as the former offer less resistance to current

4. Cleaning the charging port of your device by blow drying it to dislodge lint or dirt that does accumulate when your phone is in pocket or outdoor usage (they cause poor connection and increase resistance )

1. Devices mentioned have different battery capacities. They are meant to be charged with different rated current and therefore different power ( Asus device is 3950 mAh, Nobis is 2500 mAh, Droid Mini 2130 mAh capacity).

2. You can force higher current for faster charging but not advisable (unless OEM offers a way)

3. What you can do to ensure rated current is delivered is covered

2. Li-Ion or Li-Po charging When you charge a battery at charging rate decided by OEM, it goes through four stages of charging (Constant Current Charge,Saturation Charge and Ready No Current and Ready), see Figure 1 of BU-409 Charging Li-Ion. As you can see from graph voltage and current vary so if you are measuring current using an app like Ampere and derive wattage from current reading, you could end up in wrong comparison if you are not measuring in the same stage of charging

1. Devices mentioned have different battery capacities. They are meant to be charged with different rated current and therefore different power ( Asus device is 3950 mAh, Nobis is 2500 mAh, Droid Mini 2130 mAh capacity).

2. OEM proprietary charging methodology can also significantly vary current. For instance, Note 2 charging current is 1600 mAh while Xperia charging current is around 600 mAh for similar size battery

3. You can force higher current for faster charging but not advisable (unless OEM offers a way)

4. What you can do to ensure rated current is delivered is covered

2. Li-Ion or Li-Po charging When you charge a battery at charging rate decided by OEM, it goes through four stages of charging (Constant Current Charge,Saturation Charge and Ready No Current and Ready), see Figure 1 of BU-409 Charging Li-Ion. As you can see from graph voltage and current vary so if you are measuring current using an app like Ampere and derive wattage from current reading, you could end up in wrong comparison if you are not measuring in the same stage of charging

3. OEM proprietary charging methodology can also significantly vary current. For instance, Note 2 charging current is 1600 mAh while Xperia charging current is around 600 mAh for similar size battery