Yes and no.
First, USB is NOT universal. There is a USB standardized spec, but there are also USB devices and wall warts which operate outside of the standardized spec.
If the
device that is being charged follows the USB 1.0 or 2.0 specs then it will draw a maximum of 500mAh while charging. A USB 3.0
device will be able to draw up to 900mAh while charging. USB 3.1 is capable of 1.5A while charging.
Any
device that falls outside of these 3 operating parameters is NOT following the USB standards. This includes USB 2.0 wall warts that supply 1500mAh.
For example, Apple's USB charger supplies 2A. This is outside of any USB spec and can damage devices not designed to handle the extra power output. A USB 2.0 miniport device doesn't have the electronics to step down that power level to what it can actually use. The end result is you get situations like this when using an Apple wall wart with your ecig:
Likewise the Amazon Kindle charger outputs 1.8A, and some car chargers will output as much as 2.1A. These devices all operate outside of USB specifications and may damage older USB 1.0 and USB 2.0 devices.
And that's important to us, because the vast majority of ecig mods use the older USB 2.0 specification, and charging with these higher amp chargers can damage the battery.
im charging through VTC with an Android charger with 1500 mA output. Is that fine? Thank you.
