• Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education skip experiences global resources cider press projects digital market permies.com pie forums private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Anne Miller
  • jordan barton
  • Pearl Sutton
  • r ranson
  • Nicole Alderman
  • Greg Martin
  • Steve Thorn
stewards:
  • paul wheaton
  • Leigh Tate
  • Mike Haasl
master gardeners:
  • John F Dean
gardeners:
  • Carla Burke
  • Stacie Kim
  • Jay Angler

Can I charge a scooter battery with a car battery charger?

 
Posts: 12
Location: 1596 Jarvisville Road New York, NY 10011, USA.
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
My 50cc scooter's battery is dead. I recently bought a transferable car battery charger for when my car's battery is dead. What I want to know is if I can go ahead and use that car battery charger to charge my 12v 7ah battery for my scooter.
 
steward
Posts: 4422
Location: West Tennessee
1927
cattle cat purity fungi trees books chicken food preservation cooking building homestead
  • Likes 1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Yes you can. A 12v charger can charge any 12v battery. The difference is your scooter battery is 7ah (amp hours, for those reading who may not know) and a car battery is hundreds of amp hours, so it isn't going to take very long to charge the scooter battery compared to a automobile battery. If the charger is an old analog style where you turn a knob to set the number of hours to charge, put it at the lowest setting. If it's a new digital charger, it should know when the battery is charged and will stop charging. Over charging makes the electrolyte liquid in the batteries boil and it just kills the life of them, then they lose their ability to hold a charge. If it's charging and you hear fizzing like soda pop, the electrolyte is boiling, so stop charging.

One more note, is the age of the battery in question. If this scooter battery is 5 or more years old, and it's a lead acid battery, it may just be time for a new one. There are interesting techniques I've seen on youtube of revitalizing old lead acid batteries by dumping the electrolyte, then filling with a epsom salt solution, and getting many more years of life out of them. I have yet to try this myself, but the information is out there.
 
pollinator
Posts: 1459
Location: Midlands, South Carolina Zone 7b/8a
36
  • Likes 2
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
My best gift to myself ever, the Lightning Pack.

Had to have my scooter hauled into my local Yamaha dealer because I let it sit for over a year (bad scooter mom).

One of the first things he did was whip out this little rectangle thing and start the scooter with it.  I was in total amazement as I had never seen one before.  He said he starts his hunting buddies truck with it all of the time.

I had to have one immediately.  It is part of my emergency kit.  Starts cars, scooters, charges cell phones, computers. Has flashlight and beacon.  Every kind of charging cord comes with it.  I bought mine from my local yamaha dealer but this link is to Home Depot.

https://www.homedepot.com/p/LIGHTNING-PAK-12-Volt-Portable-Jump-Starter-5-Volt-USB-and-Flashlight-RP-Ultra-Slim/206079525?cm_mmc=Shopping|THD|google|&mid=sBW7BiWnK|dc_mtid_8903tb925190_pcrid_195274179091_pkw__pmt__product_206079525_slid_&gclid=Cj0KCQiAyZLSBRDpARIsAH66VQIG5EjrCSxsv_WvhdCCl-rOwM9U65BGxrZB7P9Y3q5m2_BU6kKnJzAaAqnJEALw_wcB


 
Posts: 81
Location: The Netherlands
11
  • Likes 1 Likes 1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator

James Freyr wrote:Yes you can. A 12v charger can charge any 12v battery. The difference is your scooter battery is 7ah (amp hours, for those reading who may not know) and a car battery is hundreds of amp hours, so it isn't going to take very long to charge the scooter battery compared to a automobile battery. If the charger is an old analog style where you turn a knob to set the number of hours to charge, put it at the lowest setting. If it's a new digital charger, it should know when the battery is charged and will stop charging. Over charging makes the electrolyte liquid in the batteries boil and it just kills the life of them, then they lose their ability to hold a charge. If it's charging and you hear fizzing like soda pop, the electrolyte is boiling, so stop charging.

One more note, is the age of the battery in question. If this scooter battery is 5 or more years old, and it's a lead acid battery, it may just be time for a new one. There are interesting techniques I've seen on youtube of revitalizing old lead acid batteries by dumping the electrolyte, then filling with a epsom salt solution, and getting many more years of life out of them. I have yet to try this myself, but the information is out there.

On a modern charger most of the time you can even select that you're charging a motorcycle battery and it will tune down the amps a bit. Most modern chargers also have a desulphating option, it takes some time to do it but you can rejuvenate older lead-acid batteries with it and squeeze an extra year or so out of them.
 
Posts: 55
Location: Valley City, ND.
3
urban solar greening the desert
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Take a peak over at this thread: https://permies.com/t/84240/Maintaining-Maintenance-Free-Sealed-Lead

Near the bottom, I talk about the SKYRC iMAX B6 Mini charger.  I can't say enough good about this little guy.  It charges ANYTHING- for $16 US.  

And you can charge one battery from another battery.  I use it with a 18Ah 12 Volt battery to charge my drone lithium batteries in the field.  

JR
 
Posts: 280
Location: Philippines
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator

James Freyr There are interesting techniques I've seen on youtube of revitalizing old lead acid batteries by dumping the electrolyte, then filling with a epsom salt solution, and getting many more years of life out of them. I have yet to try this myself, but the information is out there. [/quote wrote:

did not work for me

 
Posts: 1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
That product must work too good its been discontinued.
 
Posts: 8
4
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I have the non-Mini version of that charger and it is indeed fantastic.  However, neither one has ever been $16 to my knowledge.

Here is the one I have:
https://amzn.to/3vFbeN3
 
Jason Lee
Posts: 8
4
  • Likes 1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator

James Freyr wrote:Yes you can. A 12v charger can charge any 12v battery. The difference is your scooter battery is 7ah (amp hours, for those reading who may not know) and a car battery is hundreds of amp hours, so it isn't going to take very long to charge the scooter battery compared to a automobile battery. If the charger is an old analog style where you turn a knob to set the number of hours to charge, put it at the lowest setting. If it's a new digital charger, it should know when the battery is charged and will stop charging. Over charging makes the electrolyte liquid in the batteries boil and it just kills the life of them, then they lose their ability to hold a charge. If it's charging and you hear fizzing like soda pop, the electrolyte is boiling, so stop charging.

One more note, is the age of the battery in question. If this scooter battery is 5 or more years old, and it's a lead acid battery, it may just be time for a new one. There are interesting techniques I've seen on youtube of revitalizing old lead acid batteries by dumping the electrolyte, then filling with a epsom salt solution, and getting many more years of life out of them. I have yet to try this myself, but the information is out there.



I disagree strongly with several of your statements here.  You cannot charge any 12V battery with any 12V charger.  A car battery is not hundreds of amp hours.  Not all digital chargers will protect against overcharging (I know, I have made that mistake before of assuming that).  You cannot "recharge" a lead acid battery with epsom salt solution... saltwater batteries do work but they are much, much less energy than the electrolyte solution that originally came with the battery.  To the point where the battery will no longer be a 12V battery and will have orders of magnitude less capacity.  Why would you not just order more electrolyte and refill it for $20 or less?
 
pollinator
Posts: 3053
Location: Kent, UK - Zone 8
420
books composting toilet bee rocket stoves wood heat homestead
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
The point is that a “12V” charger will not provide a 12V supply. Typically they supply some amount higher than 12V, and the battery itself will have a maximum voltage rating. These are set such that going beyond those voltages will permanently damage the chemistry of the cell - anything from degrading the battery, to causing an internal short and a fire). These rating vary for different battery chemistries which is why you can’t use chargers interchangeably.

I’ve been doing a lot of research on lithium ion. Batteries for evoked recently, and the warning stories about mischarging these are quite something.
 
Jason Lee
Posts: 8
4
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Fortunately, lithium batteries that are purpose-built 12V battery packs are 1) generally LiFePO4 which will not explode or catch fire and 2) have built-in battery management systems (BMS) that will prevent them from being overcharged and damaged.  

But you are absolutely correct - battery chargers are designed for one chemistry only unless you have a "smart" charger that can change settings to different profiles.  Even then, these types of chargers typically have very generic settings that are not optimal for a specific battery.  For example, many chargers with "lithium" charge profiles use 14.4V as the charging voltage.  This is safe and can be used across the board on different lithium chemistries.  However, it will not 100% charge the batteries that I sell from MillerTech or my own brand, Jericho Battery Company.  These require 14.5-14.6V to fully charge.

So making a blanket statement like "A 12v charger can charge any 12v battery" can be very dangerous to the uninformed who may destroy an expensive battery, start a fire, or never get the full capacity out of their battery because they followed ambiguous or misleading advice.
 
pollinator
Posts: 1672
Location: Canadian Prairies - Zone 3b
434
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator

Jason Lee wrote:

James Freyr wrote:Yes you can. A 12v charger can charge any 12v battery. The difference is your scooter battery is 7ah (amp hours, for those reading who may not know) and a car battery is hundreds of amp hours, so it isn't going to take very long to charge the scooter battery compared to a automobile battery. If the charger is an old analog style where you turn a knob to set the number of hours to charge, put it at the lowest setting. If it's a new digital charger, it should know when the battery is charged and will stop charging. Over charging makes the electrolyte liquid in the batteries boil and it just kills the life of them, then they lose their ability to hold a charge. If it's charging and you hear fizzing like soda pop, the electrolyte is boiling, so stop charging.

One more note, is the age of the battery in question. If this scooter battery is 5 or more years old, and it's a lead acid battery, it may just be time for a new one. There are interesting techniques I've seen on youtube of revitalizing old lead acid batteries by dumping the electrolyte, then filling with a epsom salt solution, and getting many more years of life out of them. I have yet to try this myself, but the information is out there.



This whole post is just wrong.  You cannot charge any 12V battery with any 12V charger.  A car battery is not hundreds of amp hours.  Not all digital chargers will protect against overcharging (I know, I have made that mistake before of assuming that).  You cannot "recharge" a lead acid battery with epsom salt solution... saltwater batteries do work but they are much, much less energy than the electrolyte solution that originally came with the battery.  To the point where the battery will no longer be a 12V battery and will have orders of magnitude less capacity.  Why would you not just order more electrolyte and refill it for $20 or less?



No need to be negative. I think James was trying to help by explaining the principle. When it comes to a specific application, we all know that the devil is in the details.

Regarding epsom salt: the theory is that, in solution, it can be used to dissolve sulfate deposits on the plates of a lead acid battery. If successful, this would extend the battery's useful life. After the procedure, the battery is drained and replaced with standard electrolyte.
 
Jason Lee
Posts: 8
4
  • Likes 2
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Sorry.  I end up having to deal with people in my business that take misinformation like this on the internet and end up destroying their batteries or worse.  I have edited the post to be a bit less negative.  Thank you.
gift
 
Rocket Mass Heater podcast gob
will be released to subscribers in: soon!
reply
    Bookmark Topic Watch Topic
  • New Topic