The insides of 9V battery : r/diyelectronics

This post describes how to make a Police LED flasher Circuit using a 555 Timer IC and BC 547 NPN Transist…

Powering LED Strip Lights with Battery - Myledy

Electronic Kits, Electronic Projects, Electronic Schematics, DIY Electronics

2 Cell NiMH Battery Protection Circuit(s) : 8 Steps (with Pictures) - Instructables

File:9v battery and led circuit components (wires, battery, LED, resistor).jpg - Wikimedia Commons

9V Power Supply Circuit

Inside a 9-Volt Battery - RF Cafe

USB Battery Pack - 2200 mAh Capacity - 5V 1A Output : ID 1959 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits

BT-168 Battery Tester Review and Teardown

3 x AAA Battery Holder with On/Off Switch and 2-Pin JST : ID 727 : $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits

How to make your own 9 Volt Battery Clip or Connector & see What's Inside A Battery