My left AirPod dies or cuts off faster than the right

Hello everyone! I hope you're all having a good day. Unfortunately for me, my left AirPod dies faster without giving me a warning that the battery is low and just cuts off probably after 15 minutes of extensive use. I know that batteries do degrade over time and that my AirPods (1st-gen) were bought in March 2018.

If anyone else is experiencing this and know a fix, please do let me know! Thanks.