I have built a battery level indicator and have tested with a 12V battery Would it harm my arduino board if I connect a 48V battery? - Arduino Stack Exchange
LED Battery Level Indicator Arduino – Microcontroller Based Projects
New And Hot: Lithium Battery Level Indicator With Arduino And LCD - Programming - Nigeria
Battery Display Red And Green Battery Style Digital Tube Led Battery Level Display Module For Arduino - Industrial Computer & Accessories - AliExpress
Battery indicator using an OLED display | Artekit Labs Tutorials
Monitoring a LiPo battery while powering the Arduino UNO with it - Project Guidance - Arduino Forum
Battery indicator using an OLED display | Artekit Labs Tutorials
OLED Battery Level Indicator Using Arduino - Hackster.io
Open-samrt Battery Style Digital Tube Led Battery Level Display Module 4-color 10-segment Led Bar For Arduino - Industrial Computer & Accessories - AliExpress
Battery Voltage Indicator using Arduino and LED Bar Graph