Load: Samsung Galaxy Note 2, Custom 4.3 ROM (Carbon), battery @60%
Measuring tool: Charge Doctor (USB voltage and amp meter)
Stuff to test:
Cables: 12", 36" and 72" Monoprice micro USB cables
Charger 1: Samsung 2.0A USB charger (Stock Note 2)
Charger 2: Asus 1.35A USB Charger (Stock Nexus 7, 2013)
Each of the Monoprice USB cables are made with the same gage wire, visually they look the same.
Phone turned on, camera app loaded, attached the test USB cable photographed the results on the amp meter. I tested each of the 3 cables the same way and repeated the tests with the 2nd charger. Did it all within 10 minutes so that the amount of charge on the phone didn't change significantly.
Results: (See attachments)
- The Asus charger, even though it is capable of putting out 1.35A and even though the phone is capable of accepting at least 1.0A (demonstrated with the Samsung charger), it could only deliver .73A
- The Asus charger seemed to max out at .73A as the 12" and 36" cables had the same results
- The graph indicates the Samsung charger may be able to do better with an even shorter cable
1) The shorter the cable the faster the charge, but there's a limit
2) The higher amps the charger is capable of, the faster the charge, there must be a limit but I only had 2 chargers to test