Truck didnt start this AM, ?electrical trouble?

[oldblue1968chevy]

Had the same prob. last friday..

Anyhow, I woke up this morning to jump into the truck and takeoff to school, well I turned the key, volt guage (aftermarket) read 8 volts try to start and all my idiot lights come (when i move key from on to start) on including generator, and motor doenst turn over. Well I check connections only to find they're tight. So I figure My 8 year old autozone duralast battery needs replacing. I put it on the trickle charge and have dad take me to school in the 'manvan' (his truck is in the autobody shop because he has trouble backing up lol, he gota rental car van). Fast forward to after school. I get home, check truck, same as this morning. Put on 50 amp jump start, let it sit a little go to start it and ALMOST has enough juice to start. So I have dad take me to town to have my batt. checked, (right now Im hoping I need a 70$ new battery). Well guy checks it says its got too much water (thanks dad! he claimed it needed water on friday when It wouldnt start, oh btw I let the truck sit all day friday, got home and it started WTF) Anyhow, he said I had a lil much water in my batt. it was distilled water. And it was low on charge. (it has been charging on 2amp all day).

So I got home tonite (a few min. ago) and tighted all batt. to starter. ground. cleaned connections. and gonna let batt. charge a lil more and hopefully when I go outside in a few it'll crank.

Any ideas on What this may be.

Also, it may just be a coincidence. But my radio quit working around the same time.....Havent checked that one out yet...And I put a random fuse in the guage cluster spot because it blew.

Any ideas!....
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