Bought a 12V Ohmmu battery. Original 12V battery began failing as evidenced by screen warning. Took my T3 to Tesla repair service shop and asked to install the Ohmmu battery. When finished I looked in car and my new Ohmmu battery was still in original box, uninstalled. Asked service rep about it and he said they couldn't install it because of waranty, and there was no charge for the new OEM battery. Should I replace the new OEM battery with the Ohmmu or just let it go? Maybe, I should sell the Ohmmu battery on eBay, since they are hard to get.