Battery question. Can a battery have enough juice to spin an engine at it's normal cranking speed, but not have enough juice to start the engine? I worked on my friends mower a couple years ago. Got it running and it ran great. Came over a few days later and it cranked fine. Fast, no UNNNGH UNNGH. It cranked fast till I did run the battery dead. Went home and got my charger and charged it up. Barely touched the key and it fired right up, ran great. I leave the charger on the truck, so I started putting the battery on charge for like 15 minutes while I weed whacked. Always fires right up. I took it to WV this weekend. Picked it up at his house, stared instantly. Sat on the trailer over night. Got to WV, it started right up. Mowed a little bit and had obligations to take care of, so shut it off and let it sit out. Next morning it sputtered, but no start. hit it with ether, it popped but no start. My son had my truck detailed for fathers day and I've got so used to it being clean, I didn't put most of my tools back on it yet. No charger or jumper cables. Had to use a big ratchet strap to pull it back up on the trailer. Got home and hooked it up. Went in the house and watched one quarter of the foot ball game, with my wife fast forwarding the commercials. Maybe 15 minutes. Went out and as soon as I touched the key it fired right up. Took it back over my friends and it fired right up. So, I mowed his field and it ran great. I've been planning on putting a battery in it, it's several years old and doesn't get run much. Guess I'll do that as soon as I get back from PA next week? I've had cars with bad batter's in them and they would just barley turn the engine over and VROOM. I just don't get how this spins the engine fast, but wont start, then stick it on charge for just 15 minutes and it's off to the races. It is a little tractor battery.