Bob,

You need a power supply that develops at least 14.1 volts and up to 14.3 volts to properly charge the battery through the K2 coaxial power jack. It sounds like you were using a 13.8 volt supply.

73,
Don W3FPR

Bob G3YIQ wrote:
I've just installed the KBT2 option in K2 Nr. 5336. Everything checked out OK
and I charged the battery for 1 6 hours from a bench power supply. The power
supply showed some 200 mA  or so being drawn initially but after overnight
charging this had fallen to a few tens of mA. When I switched the rig on the
battery only measured 11.5V on the K2's voltmeter. The rig worked on receive
but I just got a slight hum, no indication of any output and a low battery
warning when I put the rig into TUNE. I would be grateful for any
suggestions. 73 Bob G3YiQ
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