Charging a BioLite battery is easy. To get started, connect the battery to a USB power source - such as a laptop computer, wall charger, or solar panel - with the included standard USB cable. Once connected, charging kicks off; it typically takes 4-6 hours to fully charge the battery. It’s important to note that while you can use any kind of USB power source, different sources vary in charging time. For example, charging with a laptop computer may take longer than with a solar panel. When your BioLite battery has finished charging, simply turn off the power source and disconnect it from the battery. You’re now ready to power your device!