"Battery health is different than battery life. Battery life determines how long your battery lasts on a single charge, but your battery health determines how much your battery life diminishes over time."
There are two simple ways you can maximize the battery health of your Koss TWS250i True Wireless Earbuds.
First is to charge the case to 100% before using.
Second is to charge the case at least once a month if you're not using your TWS250i on a regular basis.