Starting point is 78% Battery Life Starting point is 37% Battery Life - Bonus, I also logged Kill-a-Watt power data. The Kill-a-watt is a very basic physical tool for measuring power consumption from a standard 120V outlet.

@78% with the stock LG charger, 4.3V and 1520mA

@78% with the Anker Quick Charger, 4.4V and 1960mA

@37% with the stock LG charger, 4V and 1660mA. Kill-A-Watt = 10W and 15VA

@37% with the Anker quick charger, 4.1V and 1970mA. Kill-A-Watt = 10W and 18VA

I purchased the Anker quick charger ( http://www.amazon.com/Anker-Charger-.../dp/B00Q88Q16K ) with a promo code a few pages back for $10 USD. Because I'm a nerdy electrical engineer, I recorded some data. Obviously the tools I'm using are very rudimentary so take all results with a grain of salt.Test Setup: 2 minute charge test with screen off. Recorded maximum instantaneous mA from the Ampere app as well as the voltage.Test cases:Results:Thoughts: I was surprised that the Ampere app read ~4V with both chargers. That being said, the Anker LED indicator lit up green for 9V/12V mode. I suspect this voltage gets stepped back down within the phone to 4V and the measurement circuit is reading after it's been stepped down to 4V. The current does seem to be consistently around 20% higher with the quick charger. I was also surprised that the Kill-A-Watt reads exactly 10W with both chargers. However, the apparent AC power was elevated by 20% so that accounts for the extra current. Presumably there are more power electronics in series with the quick charging circuit which is causing some increased current draw that isn't in phase with the voltage. (Feel free to glaze over that last bit if you aren't an EE.)Bottom line: this charger appears to be 20% faster than the stock charger. I thought it might be a more significant improvement than that, especially at a lower charge level like 37%. Oh well, every bit of speed helps I guess.