Adafruit LC709203F LiPoly / LiIon Fuel Gauge and Battery Monitor [STEMMA JST PH & QT / Qwiic] : ID 4712 : $6.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Tweaking4All.com - Arduino - Controlling a WS2812 LED strand with NeoPixel or FastLED
How to Control an RGB LED Strip - Arduino Tutorial : 4 Steps (with Pictures) - Instructables
Simple POV Display using APA102 RGB LED STRIP and Arduino NANO - YouTube
RGB LED battery status with ATtiny85 as Arduino - YouTube
Arduino LED voltage level indicator
Battery Style Digital Tube LED Battery Level Display Module
Single LED as Voltage Level Indicator | Circuits4you.com
Powering Any WS2812b Setup — Project Tempos
Wiki:Gravity: Digital RGB LED Module - DFRobot
Battery Style Digital Tube LED Battery Level Display Module 4-color 10-segment LED Bar for Arduino COM53 , R23 - Faranux Electronics
LED Battery Level Indicator Arduino – Microcontroller Based Projects
BouBou Ws2812B Ring Shield For 18650 Battery Charger Li-Battery Charger Rgb Led Expansion Board Geekcreit For Arduino - Products That Work With Official Arduino Boards: Amazon.co.uk: Electronics & Photo
Battery Display Red And Green Battery Style Digital Tube Led Battery Level Display Module For Arduino - Industrial Computer & Accessories - AliExpress
Arduino Solar Charge Controller ( V 2.02) - Open Green Energy
Tiny Color Mixer - a Constant-current, 3W RGB LED With Low-battery Indicator and Polymorph Diffuser : 5 Steps (with Pictures) - Instructables