With the Testo 0554 8831 Rechargeable Battery for Thermal Imager, the user can extend the operating time of instruments and always have a second battery at hand. The Testo 0554 8831 Rechargeable Battery can be used with compatible thermal imagers. The user can easily replace the rechargeable battery directly on site without requiring any tools. This Testo Rechargeable Battery can be charged using a desktop charging station (order separately).