Isuzu Repair: 94 Isuzu Rodeo will not start, beep beep beep, isuzu rodeo

Question
94 Isuzu Rodeo, 2x4, manual, 6 cyl.
This has been a real good vehicle up until yesterday when after arriving at a destination the vehicle would not start. (here in Vegas the temps have been in 100's) completely dead. no sounds of any kind. she received a jump and returned home. Upon turning off the engine, and again turning the key there were no sounds of any kind. took the battery out and indeed the cells were low so I primmed them with distilled water and placed battery on a charger for a full charge. reinstalled and I would hear the initial beep, beep, beep upon inserting the key into ignition but completely dead upon the the first turn. Jumped the vehicle and while running I took the neg terminal off to see if the engine would die, but no such luck- ran the engine for quite a while and consistantly without a miss. The following time the truck would not start with a jump at all...can someone please help me out? thnks,  jack

Answer
Well That would conclude that your alternator is working fine(I still recommend a full charging test be performed)But the battery most likely has a dead cell in it Jack. They are very hard to detect until your stranded!:( I had a battery tested three times, past first two failed the third,  thats how I caught it Jack. Let me know if you need anything else please;)