Ted,

The battery voltage was too low to start charging without possible damage. Yes, NiMH batteries will self-discharge to the point of not being able to recover them. Keep them charged, or you can loose them. The KX3 internal charger requires a certain minimum voltage before it can start charging. Bat Err is the indication that charging cannot start.

You might be able to remove the batteries and charge them using a different charger, but be aware that if they are deeply discharged, they may overheat during the process and destroy their future lifetime.

73,
Don W3FPR

On 3/31/2018 7:36 PM, Dauer, Edward wrote:
My KX3 has been sitting idle for many months.  Turned it on today and tried to charge the battery, 
which I am guessing is depleted to zero, but I keep getting "Bat Err."  Yes, there is a 
rechargeable battery installed - it has worked just fine for years.  And yes, I did RTFM, about 
accessing the menu and the steps for readying the rig for charging (page 23, as I recall).  But 
that doesn't do it.  No matter what charge time I select, I get the same error message when I exit 
the menu.  "Bat Err."  Any ideas?  Could the batteries have died from having been ignored 
for so long?
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