I made this Cigar Box Amp using products from Adafruit. It was founded by Limor Fried in 2005. Ms. Fried is a graduate of MIT. I wanted my Amp battery to be rechargeable with lithium. All I need to do is use a USB cable to plug it into any device, including my laptop—no more AAs to trash. Check out my photo for its construction. Here is the list of the items I purchased from Adafruit. Lithium Ion Polymer Battery - 3.7v 500mAh $7.95 JST PH 2-Pin Cable - Female Connector 100mm $0.75 USB LiIon/LiPoly charger - v1.2 $12.50 Adafruit https://io.adafruit.com/
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The red light shows that it is charging. White light appears when the battery is low—green light when the battery is fully charged. Large speaker that is used for auto speakers. All other parts from CB Gitty. The main circuit board is MAH5 (V1.0) Guitar Amp KIT 5W See the side view. headphones, dc connect, & MP3 connection.
