I initially purchased a battery for my 2002 Chevy Tahoe from 1-800 Battery.com on November 13, 2023. That battery subsequently failed on September 10, 2024. That same day, September 10th, I requested a replacement battery from 1-800 Battery. The company subsequently replaced the failed original battery but, almost immediately, the replacement battery failed to start my vehicle on several occasions after September 10th causing me to miss work. Additionally, the dashboard lights flash on and off erratically as I'm driving.... a symptom of a bad battery. On September 21, 2024, I took my 2002 Chevy Tahoe to two auto parts stores, Advance Auto Parts and O'Reilly Auto Parts. Both technicians ran a test on the battery and the alternator and both corroborated that the battery was undersized for my vehicle and that it was only cranking at 643 amps but should be at 700 to 875 cranking amps. They both confirmed that the alternator was properly charging the battery. I relayed this information to 1-800 Battery via email on September 19, 2024. On September 23, 2024, 1-800 Battery responded with the following, "We have reviewed your order and the vehicle information you provided was for a CHEVROLET TAHOE 2002 V8 4.8L 294cid. On both installs the battery that was installed was compatible for the vehicle type." In its response, no mention was made of the battery failures and, the batteries they replaced my car with were undersized for my vehicle which is a 2002 Chevy Tahoe 5.3L V8, not a 4.8L V8. I asked for a full refund of my costs, $315.11 for the first purchase on November 13, 2023, and the replacement trip cost of $50, for a total refund of $365.11 which appears was declined.