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| Thread ID: 80785 | 2007-07-05 05:25:00 | 12v Jump Starters. | Cicero (40) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 565999 | 2007-07-08 21:07:00 | I have had to use them several times over the last 15 years and they NEVER work. So I have to get a friends jumper cable set and it always works. That's strange, I use cheapies and they have worked fine for a number of starts for others and two or three for me.:blush: They get warm on prolonged cranking but otherwise work fine. The usual reason for failure is not connecting them solidly at both ends, or corrosion on the clips. I had occasion to need a jump start last week in Queenstown when the battery on my rental car didn't like the cold. The guys who turned up to get me going made three attempts to connect and each time the motor failed to crank (your problem?). Then I showed them how to connect the clips properly at both ends and the car started first turn of the key. Cheers Billy 8-{) |
Billy T (70) | ||
| 566000 | 2007-07-08 21:14:00 | I have seen many a car started with these units without the battery been in the car. So should be fine with battery in | plod (107) | ||
| 566001 | 2007-07-08 23:26:00 | That's strange, I use cheapies and they have worked fine for a number of starts for others and two or three for me . :blush: They get warm on prolonged cranking but otherwise work fine . The usual reason for failure is not connecting them solidly at both ends, or corrosion on the clips . I had occasion to need a jump start last week in Queenstown when the battery on my rental car didn't like the cold . The guys who turned up to get me going made three attempts to connect and each time the motor failed to crank (your problem?) . Then I showed them how to connect the clips properly at both ends and the car started first turn of the key . Cheers Billy 8-{) All I can say to that is,thank god for B . |
Cicero (40) | ||
| 566002 | 2007-07-09 00:11:00 | Then I showed them how to connect the clips properly at both ends and the car started first turn of the key. There's probably quite a few people out there using booster cables, and probably not using them correctly. Someone once told me that you connected positive and negative clips to the positive and negative poles on the supplying battery (the one that works) and the positive clip to the positive pole on the receiving battery (the one that doesn't work) and the negative clip to the engine block (to ground it). The supplying car should be running. Maybe someone can verify this procedure? Having said this, I have on occasion hooked up the positive and negative clips to the corresponding poles on each battery (i.e. not to the engine block) and the car started without trouble. If it works like this, why the need to ground the negative clip on the receiving side? |
Lizard (2409) | ||
| 566003 | 2007-07-09 03:09:00 | The idea is to prevent sparks in the same area of the battery for the possibility of hydrogen (explosive) gas around it. Another idea is that the battery might spew acid into the face of the operator if they are trying to connect to the top post...better to be looking away or at a different object than the battery itself. AND..YES.... I know about hydrogen liberation and a discharged battery.... |
SurferJoe46 (51) | ||
| 566004 | 2007-07-09 03:33:00 | The idea is to prevent sparks in the same area of the battery for the possibility of hydrogen (explosive) gas around it. Another idea is that the battery might spew acid into the face of the operator if they are trying to connect to the top post...better to be looking away or at a different object than the battery itself. AND..YES.... I know about hydrogen liberation and a discharged battery.... The point about sparks is interesting - whenever i've had to jumpstart a car, you get sparks on the working battery if you connect the dead battery first and the live battery second. Doing it the other way round never seems to generate any sparks (but works just as well as any other way). |
Lizard (2409) | ||
| 566005 | 2007-07-09 05:46:00 | What to do is connect the two batteries with the crappy cables, whilst the good battery car is running and then rev the running car for about two or three minutes to charge the flat battery then try to start the flat battery car, always works for me, I did it this weekend on Sunday morning. At a pinch. and I have done this, using this method you can get a car started using electronic crocodile clippy connectors but sometimes they do go on fire when you start the other car haha. When I connect the batteries for the first time I gingerly touch the clip to the flat battery to see how big the spark is because sometimes the flat one can be down to nearly zero volts if someone has left the headlights on and you don't want to kill the alternator on the going car, I don't trust the current limiting sufficiently to risk it. After multiple touching if the spark is large eventually I judge it to be ok and connect fully. |
zqwerty (97) | ||
| 566006 | 2007-07-09 08:58:00 | I was walking down the Ayer river some time ago,and came across an abandoned car. Inside I found a jumper lead,it was a particularly long one and of a jolly heavy duty,so if one can find same,I recommend them. |
Cicero (40) | ||
| 566007 | 2007-07-10 04:28:00 | What to do is connect the two batteries with the crappy cables, whilst the good battery car is running and then rev the running car for about two or three minutes to charge the flat battery then try to start the flat battery car, always works for me, I did it this weekend on Sunday morning. At a pinch. and I have done this, using this method you can get a car started using electronic crocodile clippy connectors but sometimes they do go on fire when you start the other car haha. That sounds a good idea ! Regards Digby |
Digby (677) | ||
| 566008 | 2007-07-11 02:32:00 | What to do is connect the two batteries with the crappy cables, whilst the good battery car is running and then rev the running car for about two or three minutes to charge the flat battery then try to start the flat battery car, always works for me, I did it this weekend on Sunday morning. At a pinch. and I have done this, using this method you can get a car started using electronic crocodile clippy connectors but sometimes they do go on fire when you start the other car haha. When I connect the batteries for the first time I gingerly touch the clip to the flat battery to see how big the spark is because sometimes the flat one can be down to nearly zero volts if someone has left the headlights on and you don't want to kill the alternator on the going car, I don't trust the current limiting sufficiently to risk it. After multiple touching if the spark is large eventually I judge it to be ok and connect fully. Is this a commy ploy or what? |
Cicero (40) | ||
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