Go Back   EcoModder Forum > EcoModding > Off-Topic Tech
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-23-2016, 12:10 PM   #21 (permalink)
Master Novice
 
elhigh's Avatar
 
Join Date: Jan 2008
Location: SE USA - East Tennessee
Posts: 2,309

Josie - '87 Toyota Pickup
90 day: 27.96 mpg (US)

Felicia - '09 Toyota Prius Base
90 day: 52.91 mpg (US)
Thanks: 422
Thanked 608 Times in 446 Posts
I have yet to find a jumper pack that worked on our vehicles here at work. I had one that got tried on four different cars and two different trucks (at various different times), and I always made sure the pack was charged. No joy, not even once. I recycled it.

On the other hand, the jumper cables in the maintenance truck work great.

__________________




Lead or follow. Either is fine.
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 02-13-2017, 05:00 AM   #22 (permalink)
EcoModding Lurker
 
Join Date: Dec 2016
Location: Romania
Posts: 44

Simba - '05 Seat Leon FR
Thanks: 22
Thanked 27 Times in 16 Posts
Quote:
Originally Posted by vskid3 View Post
Am I the only one seeing the last picture? It looks like you can clamp it to the battery like a regular jump box and start the car that way. Still might not be good enough for a stone-cold dead battery and large engine, but would probably be fine if the battery is just on its way out. I think there's some poor translation or too much dumbing-down in the instructions.
A pocket lithium jump starter can and will start a gasoline engine in the 2 liter range, if clamped directly to battery terminals. But not in the form it's sold in stores or Amazon. As it comes from factory, it has a pack of Schottky diodes on the + wire, to protect from reverse polarity. Ordinary, board soldered Schottky diodes. A 200 amp diode is 10 times bigger and looks nothing like a board soldered diode.

So the board of diodes has to be removed and replaced with a solid copper bar. Once this is done, a 5.8Ah lithium jump starter can give "a kick" to a weak battery and turn the starter motor. After 2 starts, its charge barely falls from 4 LEDs to 3. On a dead battery it may struggle, or not be able to turn the starter motor more than a few turns.

The jump starter is less than 1/2 lbs and it can be easily held in a coat pocket, like a big smartphone.

Wires are 10 AWG, too thin to carry current for a sizable amount of time, but enough to fire a burst of current for 1-2 seconds, as needed for a jump start.

Due to being cheap and very lightweight, it's a good addition to have in the car if you are stranded somewhere with a weak battery.
  Reply With Quote
Old 02-14-2017, 04:55 PM   #23 (permalink)
ScanGauge <3
 
ThermionicScott's Avatar
 
Join Date: Dec 2016
Location: CID
Posts: 365
Thanks: 225
Thanked 129 Times in 91 Posts
It's too bad that the option of manual crank-starting went the way of the dodo long ago. Now there's a simple, cheap, direct way of cranking an engine over, if you know what you're doing.
__________________



Best tank (so far): 32 MPG
  Reply With Quote
Old 02-14-2017, 06:37 PM   #24 (permalink)
Eco-ventor
 
jakobnev's Avatar
 
Join Date: Oct 2010
Location: sweden
Posts: 1,559

Princess - '92 Mazda MX-3 GS
House of Tudor
Team Mazda
90 day: 53.54 mpg (US)

Shirubāarō (*ω`*) - '05 Toyota Prius Executive
Team Toyota
90 day: 54.88 mpg (US)

Blue Thunder - '20 Hyundai IONIQ Trend PHEV
Team Hyundai
Plug-in Hybrids
Thanks: 68
Thanked 640 Times in 404 Posts
Send a message via MSN to jakobnev
Hand crank is back:

__________________




2016: 128.75L for 1875.00km => 6.87L/100km (34.3MPG US)
2017: 209.14L for 4244.00km => 4.93L/100km (47.7MPG US)
  Reply With Quote
The Following 3 Users Say Thank You to jakobnev For This Useful Post:
Fat Charlie (02-15-2017), Fingie (05-04-2018), ThermionicScott (02-14-2017)
Old 02-15-2017, 07:50 AM   #25 (permalink)
Master EcoModder
 
Stubby79's Avatar
 
Join Date: Sep 2012
Location: Victoria, BC
Posts: 1,746

Firefly EV - '98 Pontiac Firefly EV
90 day: 107.65 mpg (US)

Little Boy Blue - '05 Toyota Echo
90 day: 33.35 mpg (US)

BlueZ - '19 Nissan 370Z Sport
90 day: 17.19 mpg (US)
Thanks: 75
Thanked 570 Times in 425 Posts
I've had/have a couple that use an 18ah SLA battery, and they will make up the difference if your battery is a bit too weak to crank over. Completely dead? Probably not, though I have hooked one directly to a starter on an engine that's out of the car and cranked it over just fine, as long as the battery pack was fully charged.

I had one with a smaller, 7ah battery in it. It could help, but wasn't really enough to make a big difference.

I h ave one of those mini lithium ones. I haven't had to use it yet, so couldn't attest to how useful they are. It only has 10-gauge wires on it, so I don't expect it'll put out more than 50 or 100 amps, whatever it might actually be rated at (400?).

Again, the big, heavy SLA ones (~18ah) work fine on 4 bangers, or even 6s.
  Reply With Quote
Old 02-15-2017, 08:18 AM   #26 (permalink)
EcoModding Lurker
 
Join Date: Dec 2016
Location: Romania
Posts: 44

Simba - '05 Seat Leon FR
Thanks: 22
Thanked 27 Times in 16 Posts
Even through 10-gauge wires, the lithium battery can fire a short burst of current, for 1-2 seconds, as needed for a jump start. But not through diodes on the wire, these have to go away.

Inside there are 3 x 3.7 volts lithium batteries, as used on tablets and bigger smartphones, wired in series. They can give, depending on size, 3900 to 8000 mAh (less than nominal, 5800 to 12000 mAh).

Lithium batteries can discharge in one burst, like a supercapacitor. This is one of the reasons they are so dangerous and catch fire so easily. Sluggish lead-acid batteries can't put out the needed amps quick enough.
  Reply With Quote
Old 05-04-2018, 11:30 AM   #27 (permalink)
In the fasting lane
 
RedDevil's Avatar
 
Join Date: Dec 2012
Location: Nieuwegein, the Netherlands
Posts: 3,948

Red Devil - '11 Honda Insight Elegance
Team Honda
90 day: 51.64 mpg (US)
Thanks: 1,675
Thanked 2,192 Times in 1,418 Posts
I got myself this Li-ion compressor and jump starter.

The compressor is the #1 application I got this for.
No more fiddling with the stubborn wire to the 12V plug on the Honda compressor which is very stiff when cold.
No more fiddling with the screw-on nipple which always leaks; this one has a proper lever.

And it can jump start the car, shine a light and charge my phone 7 times over.

Top brand too: Ultimate Speed, not Initial Mass or Intermediate Reliability... Only the Besth!


Hardly any bigger than the original compressor that came with the tire sealant kit in the car.
Much smaller and lighter than the starter cables I took out of the trunk.
__________________
2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.17 Gmeter or 0.1 Mmile.



Investors woes:
"In hindsight, I should have placed a bet on the horse that won the race"
"In hindsight, I should have bet more on that horse"

Last edited by RedDevil; 06-27-2018 at 04:33 AM..
  Reply With Quote
Old 06-27-2018, 04:24 AM   #28 (permalink)
EcoModding Lurker
 
Join Date: Jan 2018
Location: Ga
Posts: 62
Thanks: 1
Thanked 8 Times in 8 Posts
I have a Quipall jumpstart. It was a gift. I keep it in the trunk of my car.
  Reply With Quote
Old 06-27-2018, 11:26 AM   #29 (permalink)
Master EcoModder
 
Stubby79's Avatar
 
Join Date: Sep 2012
Location: Victoria, BC
Posts: 1,746

Firefly EV - '98 Pontiac Firefly EV
90 day: 107.65 mpg (US)

Little Boy Blue - '05 Toyota Echo
90 day: 33.35 mpg (US)

BlueZ - '19 Nissan 370Z Sport
90 day: 17.19 mpg (US)
Thanks: 75
Thanked 570 Times in 425 Posts
Turns out my lithium jump pack is done. Never really used it. Failed to help jump start my car the one time I tried to use it a few months back. Discovered it was toast when using the USB ports to recharge something...it only lasted a few minutes before being depleted, when it should have lasted hours.

Not planning on replacing it. Not much point if they'll crap out before getting used.

  Reply With Quote
Reply  Post New Thread


Tags
portable jumpstarter

Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com