The KXBT2 battery pack weighs about 4.8 oz, and can provide up to 8 hours of typical transceiver operation and up to 10 W power output. You can plug in an internal battery and an external supply at the same time, and the radio will operate from whichever is higher in voltage.
New shipping regulations for Lithium Ion Batteries
Until further notice, we are currently restricted to shipping up to 3 KXBT2 batteries in a single shipment, with one of the three batteries inside a KX2 - this is for both US and international shipments. We cannot ship Lithium Ion Batteries to the following countries: Australia, Japan, Spain and Thailand. Battery orders shipped separate from the KX2 can only be shipped UPS Ground - US only.
We apologize for the inconvenience.
A: The KX2 uses our KXBT2 internal battery option, a fully sealed and electronically protected lithium-ion battery pack. The KXBT2 can be plugged in either internally or externally to the transceiver. It is fitted with a 2.1mm ID/5.5mm OD plug. The pack is installed in the KX2 by opening the bottom cover as shown in the next illustration.
A: Yes: The KXIBC2. This internal charger works with or without the KX2 turned on, generates no RFI, and includes the same real-time clock functions as the KXIO2. It can charge the internal battery from any small external power supply, battery, or solar panel. For a full charge, the external source should provide 13.5 to 15.0 V, though voltages as low as 12 V can provide a useful amount of recharge.
A: No. Elecraft provides a complete solution for using and recharging the KXBT2. Specific voltage, current, and temperature limits are enforced to ensure safe operation. We do not recommend alternative methods of recharging the KXBT2.
A: No. The KXBT2 Charger can only be used to recharge a KXBT2 that has been removed from the KX2. For longer outings, you may wish to bring a spare battery pack.
A: No. The dimensions of the KXBT2 will not allow it to fit inside the KX3, even if its AA battery holders are removed. The KXBT2 can, however, be connected to a KX3 externally and will operate the KX3 at up to 10 W output. The KXBT2 will also power most devices rated for 9 to 15 volts, including our other small transceivers, PX3 (matching panadapter for the KX3), and XG3 signal generator.
