Help! Electrical system killin me
So my battery is giving me crap and i think its just aout damn near dead. hadnt started in in a couple days and yest mornon started up just fine. then leaving work nothing. adjusted battery cables a lil and started right up.. got home tightened them up and started it a few times no problems. got in this morning to go to work. lil hesitation on the crank but started fine. went to grab a bite for lunch. and NOTHING!! super low voltage, no radio power. zilch. not even clickin to start. now lately i have been noticing my speedo will randomly flicker up and down between 20-30 mph at a redlight. wtf??? any ideas??