The following is the latest Project videos from Wagner’s TechTalk.  These are projects that were not created/designed by Wagner’s TechTalk but assembled and demonstrated by us.  If you’re interested in our Inventions, please see this page.

How To: Samsung Galaxy S7 Battery Replacement

Batteries in the top of the line cell phones typically only last 2-3 years, yet those phones cost nearly a thousand dollars (or more). The battery in my wife’s Samsung Galaxy S7 was not holding a charge. Our decision: do we buy a new phone or simply replace the battery? As it turns out, it only cost $15 to replace the battery ourselves vs. $700+ for a new phone. This video will show you how to do it yourself! This video is NOT for the S7 Edge.

Warning:  Repairs will void the warranty with your service provider and manufacturer of the phone.  Also, a few cautions:  Don't use metal tools when prying the battery up, use the plastic guitar pick/prying tool instead.  Use proper eye protection and follow all manufacturers recommendations above all else.  Adding additional sealant is up to you, I reused what was there but keep in mind it will not be as water resistant.

Samsung Galaxy S7 SM-G930 EB-BG930ABA /EB-BG930ABE Samsung Galaxy S7 SM-G930V ( Verizon ) Samsung Galaxy S7 SM-G930A ( AT&T ) Samsung Galaxy S7 SM-G930P ( Sprint ) Samsung Galaxy S7 SM-G930T ( T-Mobile ) Samsung Galaxy S7 SM-G930R (U.S. Cellular ) Samsung Galaxy S7 SM-G930 ( MetroPCS / Cricket / Virgin Mobile ) Samsung Galaxy S7 SM-G930 ( Tracfone / Boost Mobile ) Samsung Galaxy S7 Duos SM-G930FD Samsung Galaxy S7 SM-G930F ( International version )

Items Shown in this Video

How to Replace your Samsung Galaxy S7 Battery

Building a single-panel JUMBOTRON using HACKERBOXES 0036

This month’s Hackerbox #0036 I found very interesting. In the box was a single RGB LED Matrix with 64×32 pixels! It’s one of the panels that is used for making those massive retro arcade classics that you see at Dave & Busters, Stars and Strikes, etc. I’ve always wanted to see what these panels look like and work with one, Hackerbox delivered! Let’s check it out!


  • You can check out previous boxes/subscribe here
  • You will find this box guide here
  • TP 4056 Like the one I used here
  • Driver for the ESP32 here