A:Answer Despite what that one person said, these DO NOT use a AAA battery as their power source. I'm not exactly sure where you would put the AAA battery in these small earbuds. Some of them will come almost fully charged, others will come half charged, and others will come almost empty. My earbuds were almost full whenever I opened them but my wife's were nearly empty. It's all random. Now, you do not need to plug these in and charge them overnight or for any other long period of time for their first charge. At this point, that's an "old wive's tale" dating back to when portable devices relied on NiMH and various other Ni-based batteries with terrible controllers. Modern devices (ones made within the last ~9 years) use Li-ion batteries with smart electronics to control them. Leaving these earbuds plugged in for an extended period of time won't do anything because, once the battery is full, the controller chip will shut off the charging power source. This prevents the battery from being overcharged and ruined. You also don't need to fully drain these before charging them. Again, that isn't how modern batteries operate.
Use the earbuds like normal and you'll be fine. Charge them whenever you have time (though I wouldn't keep them full all the time) and use them regularly. The battery in them should last a good 4 years before it starts to deteriorate and, by then, you'll be looking at getting a new pair of earbuds/headphones anyways.
