[Elecraft] KX3 charger failure?

[Don Wilhelm]

Istvan,

There are protective diodes in series with both the internal batteries 
and the external supply, so the fact that the KX3 shows 0.3 to 0.4 volts 
lower than the external supply is normal.

73,
Don W3FPR

On 10/8/2020 2:53 AM, István Szabó wrote:
> When I plug in the 13.8V PS the radio shows 13.8V for only 1 second and
> drops to 10.4V. Eneloop batteries all OK 1.29V individually. Running a 4
> hour charging cycle it turns off when voltage reached and shows the
> dropped voltage. When batteries removed the voltage shown on display 13.8V.
> Is it known failure, what can I do to fix it?