It's frustrating when a battery won't charge, especially when you've tried a new charger.
Since you've already replaced the charger and the problem persists, it's likely that the issue is with the battery itself. To further diagnose the problem, you can use a battery tester to check its health and capacity. Look for signs of sulfation, a common battery problem that can prevent it from charging. Additionally, try charging the battery using a different power outlet or source to rule out any issues with the original one. If you've exhausted all other options, it might be best to consult a professional for a thorough inspection and diagnosis. They can determine if the battery is beyond repair or if there's another underlying issue.