Check the battery terminal voltage with the engine running at fast idle. With a pretty good charge in the battery it should be 13.5 volts or more, up to 14.5 or so. It sounds like the charging system has gone belly-up and the battery can only support the ignition system for a short drive. "Test- - - -not guess!"
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!