Intermittent Battery Disconnection / Powering Off By Itself

After extensive use, drops, charges, and a battery replacement (looking to replace again soon after almost 2 years), the left earbud is having issues staying on and connected.

The past week or two had the left earbud causing more excessive buzzing than it usually makes while occasionally dropping connection altogether then reconnecting by itself soon. Sometimes it'd stop the buzzing after shaking my head a little. While there's no obvious indicator it's on other than wearing it, the Samsung Wearables app indicates it's not connected, even when it's actively sitting in a plugged-in charging cradle and flipping closed then open after some time.

After hearing it softly buzz while not making a connection and the charger's inner light green when placing the clearly not full earbud in, it seems the battery is losing contact. Squeezing the earbuds from touch end to charging contact terminals causes it to turn on and operate as usual, for now. I assume it's only going to get worse and curious what could be done to permanently, or long-term, fix this.