Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




1196 posts

Uber Geek


#224278 10-Nov-2017 11:06
Send private message

Having two cars with flat batteries yesterday (so no jump-starting possible) I started looking at jump alternatives and was surprised to find how many gizmos are on the market now.

 

Like - when I last looked, several years back - the tiny Lithium kits weren't available.

 

So, as my old wagon will soon be going to Toyota Heaven, I won't have any backup next time I leave the ute's parking lights on.

 

Recommendations would be appreciated.

 

 

 

 





'Ask not what you can do for your country: ask what you can do for me'. Donald J.Trump. US President 2016 - 2020.

 

 

 

 


View this topic in a long page with up to 500 replies per page Create new topic
 1 | 2 | 3
1203 posts

Uber Geek


  #1898831 10-Nov-2017 11:49
Send private message

I have been similarly caught short, put my 10 amp charger on the battery and 30 minutes later the engine could be started. I now have a no name lithium jump pack but I've only jumped motor bikes with it so far so can't fully recommend this brand yet.

 

I think every geek and car guy should have a battery charger in their cache of tools.

 

Ideally you should put the battery on a charger overnight after flattening. Although the ute battery will have sufficient charge to start the vehicle and get you on your way, the battery won't be back up to fully charged, as it takes about 8 hours engine running to 80% charged and another 8 -16 hours to get the last 20% in. The whole time you battery is less than 100% charged, the plates are sulphating or aging, which is stealing battery capacity and life. It may take 2 tanks of gas/2 weeks before your battery is back fully charged if it is only receiving charge from the alternator, but you can easily fully charge the battery overnight/in a day with a charger.

 

Added consideration is that because the battery is presently lower than normal, you might not get away with things that are not normally a problem, such as leaving the lights on while grabbing some milk from the diary, or listening to the radio while awaiting the other half to finish shopping. 


640 posts

Ultimate Geek


  #1898832 10-Nov-2017 11:49
Send private message

I have a seldom-used car with a tiny battery that’s prone to going flat (Honda Jazz) so frequently have to deal with this. I bought a typical Repco 900 amp jump starter and it does the job fine. After I used it a few times the battery got so sick it stopped holding a decent charge. I then bought a Ctek MXS 5.0 charger and ran it through a recondition cycle – basically a long slow controlled overvolt, causing the liquid in the battery to bubble and mixing everything up. This revitalised my battery. I now plug it in to charge overnight every month or two and it keeps ticking along. Don’t think I’ve used the jump starter since I got the Ctek, and if I could go back in time I wouldn’t have bought it at all. The Ctek leaves the battery far healthier than jumping + any amount of driving could do.

 

That said those compact lithium ones do look very handy for jumping other people’s cars and generally acting as an emergency power source – I'd be interested to hear how well they work.


 
 
 
 


6615 posts

Uber Geek
Inactive user


  #1898834 10-Nov-2017 11:52
Send private message

 

Those cheap lithium ones are not what they advertise at all. Many youtube videos on it.

Get a new car battery of the appropriate spec and enjoy 4-5 years of faultless starts. Heck, My beema can last all night with all the cabin lights on and still crank over as if she was 100% the next day. 

 


4893 posts

Uber Geek

Trusted

  #1898836 10-Nov-2017 11:54
Send private message

I've got a charger like this: http://www.supercheapauto.co.nz/Product/SCA-Smart-Battery-Charger-3-Stage-12-Volt-1-6-Amp/343260?menuFrom=1021637

 

Luckily my car has external terminals and tend to leave the car on this chargers as it's not used often during the week.





Previously known as psycik

OpenHAB: Gigabyte AMD A8 BrixOpenHAB with Aeotech ZWave Controller, Raspberry PI, Wemos D1 Mini, Zwave, Xiaomi Humidity and Temperature sensors and Bluetooth LE Sensors
Media:Chromecast v2, ATV4, Roku3, HDHomeRun Dual
Windows 10
Host (Plex Server/Crashplan): 2x2TB, 2x3TB, 1x4TB using DriveBender, Samsung 850 evo 512 GB SSD, Hyper-V Server with 1xW10, 1xW2k8, 2xUbuntu 16.04 LTS, Crashplan, NextPVR channel for Plex,NextPVR Metadata Agent and Scanner for Plex


6615 posts

Uber Geek
Inactive user


  #1898922 10-Nov-2017 14:21
Send private message

davidcole:

 

I've got a charger like this: http://www.supercheapauto.co.nz/Product/SCA-Smart-Battery-Charger-3-Stage-12-Volt-1-6-Amp/343260?menuFrom=1021637

 

Luckily my car has external terminals and tend to leave the car on this chargers as it's not used often during the week.

 

 

 

 

Car has external terminals? Aye?

My car has the battery in the boot and a jumper under the bonnet which isolates to starting sequence and doesn't power accessories. 
Never heard of battery terminals outside of the car? Mind letting me know so I can go round with some wire and cause havok? 


4893 posts

Uber Geek

Trusted

  #1898926 10-Nov-2017 14:24
Send private message

Coil:

 

davidcole:

 

I've got a charger like this: http://www.supercheapauto.co.nz/Product/SCA-Smart-Battery-Charger-3-Stage-12-Volt-1-6-Amp/343260?menuFrom=1021637

 

Luckily my car has external terminals and tend to leave the car on this chargers as it's not used often during the week.

 

 

 

 

Car has external terminals? Aye?

My car has the battery in the boot and a jumper under the bonnet which isolates to starting sequence and doesn't power accessories. 
Never heard of battery terminals outside of the car? Mind letting me know so I can go round with some wire and cause havok? 

 

 

Well externalish.  Like yours.  Exposed terminals under bonnet and battery in boot. Just leave the car in the garage with the bonnet up.  Wish I could plug an induction charger to it.

 

 





Previously known as psycik

OpenHAB: Gigabyte AMD A8 BrixOpenHAB with Aeotech ZWave Controller, Raspberry PI, Wemos D1 Mini, Zwave, Xiaomi Humidity and Temperature sensors and Bluetooth LE Sensors
Media:Chromecast v2, ATV4, Roku3, HDHomeRun Dual
Windows 10
Host (Plex Server/Crashplan): 2x2TB, 2x3TB, 1x4TB using DriveBender, Samsung 850 evo 512 GB SSD, Hyper-V Server with 1xW10, 1xW2k8, 2xUbuntu 16.04 LTS, Crashplan, NextPVR channel for Plex,NextPVR Metadata Agent and Scanner for Plex




1196 posts

Uber Geek


  #1898939 10-Nov-2017 14:41
Send private message

Re conventional battery charging, my Toyota handbook says that instead of connecting the charger's pos and neg terminals to the battery, I should connect the pos only to the battery, disconnect the battery's neg terminal then connect the charger's neg terminal to the chassis.

 

Anyone know why this method is considered important? The manual stresses that this method should be followed but doesn't say why.

 

 





'Ask not what you can do for your country: ask what you can do for me'. Donald J.Trump. US President 2016 - 2020.

 

 

 

 


 
 
 
 


470 posts

Ultimate Geek


  #1898958 10-Nov-2017 15:06
Send private message

geekIT:

 

Re conventional battery charging, my Toyota handbook says that instead of connecting the charger's pos and neg terminals to the battery, I should connect the pos only to the battery, disconnect the battery's neg terminal then connect the charger's neg terminal to the chassis.

 

Anyone know why this method is considered important? The manual stresses that this method should be followed but doesn't say why.

 

 

 

 

 

 

If you disconnect the battery from the chassis and then connect the charger to the chassis you won't recharge the battery.


3768 posts

Uber Geek

Lifetime subscriber

  #1898977 10-Nov-2017 15:57
Send private message

The idea of connecting the negative lead to the chassis rather than to the battery terminal is that in theory there could be hydrogen gas around the battery, and connecting the second lead could cause a spark, which could ignite the hydrogen.

 

If you connect the second lead to somewhere other than the battery, then there's no chance that the spark and hydrogen will coincide.

 

But, yes, disconnecting the battery negative from chassis would prevent charging. And reconnecting it is likely to cause a spark or two.

 

 




1196 posts

Uber Geek


  #1898980 10-Nov-2017 16:04
Send private message

Sorry, I'm confused.

 

Are you saying that it's safer to connect the charger's neg connector to the chassis, but the battery's neg terminal shouldn't be disconnected? 

 

 





'Ask not what you can do for your country: ask what you can do for me'. Donald J.Trump. US President 2016 - 2020.

 

 

 

 


Minimalist
5637 posts

Uber Geek

Moderator
Trusted
Lifetime subscriber

  #1898994 10-Nov-2017 16:46
Send private message

geekIT: Are you saying that it's safer to connect the charger's neg connector to the chassis, but the battery's neg terminal shouldn't be disconnected? 


 



Yes



1196 posts

Uber Geek


  #1899131 11-Nov-2017 09:24
Send private message

Got it. Cheers wink

 

One more question about charging batteries the conventional way:

 

After I completed flattened the battery on my 2005 Toyota, I connected my trickle charger, hoping that it would come back fairly quickly. But no, the ignition and dash lights worked after an hour or so, but it took around 5 hours before it would start the engine.

 

But it seemed to revive with a rush in the last 2 hours of the 5, as it sounded pretty juicy when it turned the engine over, whereas not much earlier, turning the key did zip.

 

Anyway, my question is: I only charged the battery for that period - 5 hours. Then I drove it a couple of kilometers down to the shops and back and it hasn't done any trips since. But it still starts ok now, which is two days later.

 

But I'm wondering if I should now give it a full overnight charge (or longer) to fully top it up?





'Ask not what you can do for your country: ask what you can do for me'. Donald J.Trump. US President 2016 - 2020.

 

 

 

 


934 posts

Ultimate Geek


  #1899147 11-Nov-2017 10:30
Send private message

You’ve got a trickle charger, why wouldn’t you charge to 100%?




BlinkyBill


5940 posts

Uber Geek

Trusted
DR
Lifetime subscriber

  #1899148 11-Nov-2017 10:36
Send private message

geekIT:

 

<snip>

 

But I'm wondering if I should now give it a full overnight charge (or longer) to fully top it up?

 

 

It takes at least 48 hours to fully recharge a flat battery with a trickle charger - eg overnight on several consecutive nights, or over a weekend.

 

If the battery is old and stuffed, it may no respond to a trickle charger at all.





Sideface


3885 posts

Uber Geek


  #1899226 11-Nov-2017 12:28

It depends entirely on how much current the charger can provide and what the batteries Amp Hour capacity is. Rule of thumb is to charge for 12 hours at 0.1 X the AH rating. E.g. charge a 90 AH battery at 9 amps.

More on charging lead acid batteries. [url=]http://batteryuniversity.com/learn/article/charging_the_lead_acid_battery[/url]

Also a lot of cars on purpose under charge their batteries to reduce alternator load and therefore improve fuel economy. They often will also run a really high charge voltage when the car is engine braking, as a rudimentary means of regenerative braking. So in a lot of new cars, It is unrealistic to expect a battery to last 5+ years like how they used to.





 1 | 2 | 3
View this topic in a long page with up to 500 replies per page Create new topic





Twitter and LinkedIn »



Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Chorus completes the build and commissioning of two new core Ethernet switches
Posted 8-Jul-2020 09:48


National Institute for Health Innovation develops treatment app for gambling
Posted 6-Jul-2020 16:25


Nokia 2.3 to be available in New Zealand
Posted 6-Jul-2020 12:30


Menulog change colours as parent company merges with Dutch food delivery service
Posted 2-Jul-2020 07:53


Techweek2020 goes digital to make it easier for Kiwis to connect and learn
Posted 2-Jul-2020 07:48


Catalyst Cloud launches new Solutions Hub to support their kiwi Partners and Customers
Posted 2-Jul-2020 07:44


Microsoft to help New Zealand job seekers acquire new digital skills needed for the COVID-19 economy
Posted 2-Jul-2020 07:41


Hewlett Packard Enterprise introduces new HPE GreenLake cloud services
Posted 24-Jun-2020 08:07


New cloud data protection services from Hewlett Packard Enterprise
Posted 24-Jun-2020 07:58


Hewlett Packard Enterprise unveils HPE Ezmeral, new software portfolio and brand
Posted 24-Jun-2020 07:10


Apple reveals new developer technologies to foster the next generation of apps
Posted 23-Jun-2020 15:30


Poly introduces solutions for Microsoft Teams Rooms
Posted 23-Jun-2020 15:14


Lenovo launches new ThinkPad P Series mobile workstations
Posted 23-Jun-2020 09:17


Lenovo brings Linux certification to ThinkPad and ThinkStation Workstation portfolio
Posted 23-Jun-2020 08:56


Apple introduces new features for iPhone iOS14 and iPadOS 14
Posted 23-Jun-2020 08:28



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.