XS Power Titan8 PWR-S6-5100R 14v Lithium Titanate Battery UNDERHOOD SA – Droppin HZ Car Audio
Amazon.com: Car Power Inverter for Tesla, Car Charger 150W DC 14V to 110V AC for 2019-2023 Model 3 Model Y with Type C Ports Led Display Dual USB Ports Quick Charge 3.0
I Key Buy Amplificador 3.0 Farad Car Capacitance 10--14v Voltage Power Supply Hybrid Digital Audio Capacitor Car Amplifier - AliExpress
Is something like this good enough to test car audio amplifiers and speakers and (no I don't expect it to work as an amp dyno) just need it to power to test