Car batteries tested: Optima AGM, Duralast (Autozone), Everstart (Walmart), Diehard AGM (Sears), SuperStart (O'Reilly), and Autocraft (Advance). Internal resistance, cranking amps, charge rate, and cold cranking amps tested. ➡ Thank you very much for supporting the channel: https://www.patreon.com/projectfarm ➡ An easy way to find past videos along with products tested: http://bit.ly/2FCrBpk A big thanks to Jim for putting this together. ➡ Merch: www.Project-Farm.com ➡ Click here if you'd like to subscribe: https://www.youtube.com/channel/UC2rzsm1Qi6N1X-wuOg_p0Ng ➡ As an Amazon Associate I earn from qualifying purchases. Foxwell BT705 Battery Tester: https://amzn.to/34lBPVF Videography Equipment: Sony DSC-RX10 III Cyber-shot Digital Still Camera: https://amzn.to/2YdXvPw Canon 70D Camera: https://amzn.to/31b5Gy0 Azden Microphone: https://amzn.to/34d3DLE Go Pro Bundle: https://amzn.to/31aince This video is only for entertainment purposes. If you rely on the information portrayed in this video, you assume the responsibility for the results. Project Farm LLC