Answer 2: Enamel is the hard material that coats your teeth, and is made mostly of a mineral. However, we call other things enamel. There's enamel paint, which is totally different, and there's also porcelain enamel, which is used to make a lot of dishes.
All of this is due to Amazon's unique approach with the Echo. It's not a portable speaker like we've seen from Jambox and Logitech. Instead, it's a rather large, cylindrical device that needs to be plugged into power. It's something you'll likely just leave in a single spot in your home.
The Xantrex Digital echo-charge is specially developed for charging an auxiliary battery with Freedom TM or Fleet Power Â® Inverter/Chargers or with any charging source. The Digital echo-charge automatically switches ON and OFF, charging a starter or auxiliary battery without affecting the main house battery bank. The maximum charge current is 15 amps when the starting battery is 1/2 volt to 1 volt DC less than the house battery. The Digital echo-charge is designed to work on 12 VDC or 24 VDC systems. The Digital echo-charge is a voltage-follower, following the three-stage charge modes of the Freedom Charger. This method protects the starter battery from over-charging and ensures a long life for the battery. If using another charge source, the Digital echo-charge will follow the charge stages of the source.