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Oh, I'm aware of what value a lead-acid battery has in cars. But after considering it for a short bit I'm not so surprised that you could jump start a car with

by plorg 11y ago

Oh, I'm aware of what value a lead-acid battery has in cars. But after considering it for a short bit I'm not so surprised that you could jump start a car with a smaller lithium battery (as opposed to the bulky equipment that most mechanics around here will carry around to do the job).

deleted 11y ago
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Johnythree 11y ago
But you are not jump starting the Car with the Lithium battery. You are slowly recharging the existing car's battery so that it has enough charge to start the car. If you disconnected the car's battery this wouldn't work. The big battery (and leads) that your mechanic uses does have sufficient capacity and peak current to jump start the car, even if the car's battery was disconnected. An old, old trick is to recharge your car battery in an emergency with a bunch of dry cells (eg torch batteries).
- maxerickson 11y ago
  I was curious about whether the battery can push the current to start a vehicle or not. Going by the videos they post, it can: http://thepowerall.com/index.php?route=information/information&information_id=59 http://thepowerall.com/index.php?route=information/informati... The video at the lower right shows the Jeep starting with the vehicle battery disconnected (the booster is clamped to the disconnected positive lead).
- plorg 11y ago
  Pretty much everyone in this comment thread besides you seems to think that I am suggesting replacing a car's main battery with a lithium battery. I do not believe I ever suggested that. While I respect that you seem to have read a more circumscribed version of my comment, I'm not sure what your quibble is. A two-pound battery pack that can be used to jump-start your car seems like a heck of a win for most people. Yes, you can start your car by disconnecting your battery and connecting a charged lead-acid battery. That seems pretty obvious. I can't think of a reason you'd need to do this, though, unless your car's main battery has gone bad. And if that's the case you will need to call a mechanic anyway. Leave alone that the lithium batteries mentioned above are advertised to supply 400 amps, enough to start many cars.

by plorg 11y ago

deleted 11y ago

[deleted]

Johnythree 11y ago

But you are not jump starting the Car with the Lithium battery. You are slowly recharging the existing car's battery so that it has enough charge to start the car. If you disconnected the car's battery this wouldn't work. The big battery (and leads) that your mechanic uses does have sufficient capacity and peak current to jump start the car, even if the car's battery was disconnected. An old, old trick is to recharge your car battery in an emergency with a bunch of dry cells (eg torch batteries).

maxerickson 11y ago
I was curious about whether the battery can push the current to start a vehicle or not. Going by the videos they post, it can: http://thepowerall.com/index.php?route=information/information&information_id=59 http://thepowerall.com/index.php?route=information/informati... The video at the lower right shows the Jeep starting with the vehicle battery disconnected (the booster is clamped to the disconnected positive lead).
plorg 11y ago
Pretty much everyone in this comment thread besides you seems to think that I am suggesting replacing a car's main battery with a lithium battery. I do not believe I ever suggested that. While I respect that you seem to have read a more circumscribed version of my comment, I'm not sure what your quibble is. A two-pound battery pack that can be used to jump-start your car seems like a heck of a win for most people. Yes, you can start your car by disconnecting your battery and connecting a charged lead-acid battery. That seems pretty obvious. I can't think of a reason you'd need to do this, though, unless your car's main battery has gone bad. And if that's the case you will need to call a mechanic anyway. Leave alone that the lithium batteries mentioned above are advertised to supply 400 amps, enough to start many cars.