Charge the Elecraft KXBT2 battery pack before installing in the KX2. The battery cannot be charged while installed the KX2. Typical charging times are 2 hours for a fully depleted battery pack; 1 hour for recharging in normal conditions. Install the charged KXBT2 battery pack in your KX2 as described in your KX2 Owner’s manual.
The KXBT2 battery pack delivers less than 12 V when fully charged. You may need to reduce your KX2 power output accordingly (See Transmit Settings in your KX2 Owner’s Manual). FEATURES Constant-Current Charge at 2000 mA, stabilized output with low ripple. Over-voltage protection Short-circuit protection Polarity error protection Over-power protection