The Fisher Labs 26650SYSTEMPHA Receiver Rechargeable Battery Kit is designed for use with the Receiver from the TW9000 Multi-Frequency Underground Utility Locator and Line Tracer System Kits. This kit includes all components necessary to power the receiver along with recharging the battery itself. The 26650 Lithium-Ion Rechargeable Battery provides the receiver with up to 17 hours of operation at a full charge. The ADAPTOR26650 Battery Holder/Adapter holds the battery for insertion into the receiver. To charge the battery, the charger, USB cable, and AC power adapter can be utilized.