Battery system light

Hello, I’m Pete from the Car Genius team at RepairPal. I’m sorry you’re dealing with this concern on your Hyundai Accent. Based on the information provided with how you have a new battery in your vehicle and the battery light is still on and how the engine is lagging or slow to respond to acceleration, this can be caused by a component like the alternator itself failing internally to where it has to be replaced or an issue with loose, damaged, or corroded battery cable connections at or leading from the battery. On most models anytime the battery/charge light comes on this is usually an indication of the alternator itself failing or a possible connection issue at the alternator or battery itself. I recommend having all of these checked into to help pinpoint which component is creating this concern so it can then be repaired properly from there. If you’d like to find a trusted, certified repair shop in your area, you can check here: https://repairpal.com/certified. If you need more advice, or have any further questions about your vehicle, we’re here to help. Just give us a call at 877-913-1554 where we will be happy to assist!