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If you really are charging the battery via the external 12V jack, then you must have an FT-60E, not an FT-60R. Or possibly an older original FT-60. My guess, though, is you are powering the radio, but not really charging the battery.
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I can only go by what my manual says. YMMV (unless you are on Dagobah, then VYMM).
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Michael WA7SKG
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