The Adrel ALT-BMP uses a special adapter that works as both the data port for the altimeter to the computer, and as a charger for the battery. The charger used to connect the altimeter to a computer using a standard USB cable with tip type B. The Adapter has a built-in control system for the single-cell Li-Po battery recharger.
Using data port/charging adapter, you can recharge the Adrel lithium-polymer batteries. Charging is indicated by red LED. When the LED is off, charging is finished. Connect the USB cable to any power source, such as a computer, mobile phone charger, or battery pack.