The Danger of Voltage Drops From High Current (Amp) Loads - Attainable Adventure Cruising
Awesome Ideas | Lifetime battery for any clock | 3.7v to 1.5v Converter | Circuit for wall clock - YouTube
batteries - When will the AA battery voltage drop? - Electrical Engineering Stack Exchange
Amazon.com: Low Voltage Disconnect, Icstation Over Charge Discharge Protector, Digital Charging Timer Controller, Voltmeter Ammeter for DC 5V-38V Lithium Lead Acid Battery : Industrial & Scientific
Datalogging with power-loss protection & How to make a battery backup circuit if mains fails (using mosfet) - #17 by GigaNerdTheReckoning - General Electronics - Arduino Forum