1AU Universal Charger

[Aaron]

Tesla Chargers | Products

YouTube - Universal Battery Charger | 1AU | Tesla Chargers

I have a great testimonial for one battery I've charged over the last few
days with the 1AU Universal Charger available at Tesla Chargers | World's Most Efficient, Effective & Advanced Battery Chargers

My friend gave me a battery out of his Nissan Sentra that has been sitting
since last spring or summer. It is a typical 12v car battery.

When I measured the voltage, it was sitting at 0.76 volts!! Not even 1
volt.

I hooked up the 1AU and put it on the #6 setting for the highest amps 12v
selection.

After the first charge cycle, it charged up to the 12v range and dropped
and settled at the mid 11's.

I charged it 3-4 more times (without drawing a load) and it was getting
close to 12. I checked the fluid only after these several charge cycles
and it was a little low in each cell, but not much - still covered all plates
so I just topped up to the bottom of the plastic hole.

After the first charge after topping it off, the battery settles at 13.00v.

I hooked an inverter to the battery and ran a 110v lamp that is adjustable
with 3 settings..bulb is 60w and I would imagine it would be pretty
accurate to guess the settings would be 20w, 40w and 60w.

Anyway, I ran it on the middle setting for 40w and it held like a champ for
about 5 hours and I couldn't get it below 12.43v over that period of time
and I didn't want to wait. So I hooked the charger back up last night
before going to bed (early this morning) - I just checked and the battery
is settling at 13.35v!

There is no question it pulls a load as I did it last night so the charge is
real. I'm sure the battery wasn't in that bad of shape as the cells have to
not be damaged to recover it and the sulfation was just sitting sulfation
and not from deep damaging discharge.

In any case, I have a battery that is rejuvenated almost like new after
sitting in freezing temps outside throughout the winter at less than 1
volt and here is is now at almost 13 and a half.

After the current charge cycle ends, I'll load it to the full 60w bulb until
it gets to 11-11.5 or so then recharge. I bet I can get it to sit at close to
14v if not more.

[ren]

Gold.

Well done Aaron.

That is testament right there.

Ive NEVER seen a battery at less that 1 volt come back to anything near useable.

Regards

[Aaron]

battery result

I was surprised. If the battery is under a couple volts, this charger
won't even kick on. But there is a button on the back of the charger
that can be pressed and it gives a kick to the battery so the charger
sees the required voltage - then it turns on. I had to do that for this
battery.

I have another car battery that was at 0.25 volts when I pulled it out
of an old car. It was sitting for about 12 years though so I think too
many hot summers and cold winters killed it. I was able to get the voltage
pushed to 12+ volts, but it settles down at 6 and I can't break past that.
In any case, it was amazing to see this one even get to more than a couple
volts.

[amigo]

I see we can build a universal battery charger, but can't for the love of God buy a cheap microphone and put it on the person speaking. Instead we record with an ambient microphone on the camera, nice...not, as this is 2010 and not 1990.

[Aaron]

charging success on big batt

The 30a12 or 15a24 chargers are more made for rejuvenating the bigger
batteries.

However, I have used my 1AU on many different kinds of batteries including
big car batteries and it does fine from my experience but it is a bit slow,
but worth the wait. Smaller batts are pretty quick to charge.

If I was going to get one charger only for car batteries, it would be the
bigger ones but that is because they also have automatic
loading/charging cycles. So when they're done, they're done automatically.

2 hours ago, I check the volt meter and the 1AU was pushing 15.00v!
I just checked it again and the green light was on and the
battery was resting at at 13.51v.

Tomorrow, I'll load it with 40-60 watts until it hits at least 12v this time,
then I'll charge it back up and I think I'll be done with it.

[Aaron]

2a12 and 1au

Chasson, that is close to the results I'm getting. But you don't have to wait
as long as I do.

For anyone that doesn't know. The 2A12 means 2 amps at 12 volts. The
1AU is 1 amp and does batts from 1.5 up to 24v.

That 2A12 is the first in the series and has just proven to be such an
incredible 12v charger!

I'll try to post some vid and pics of this battery and it getting charged.

[dambit]

Chasson, that is close to the results I'm getting. But you don't have to wait
as long as I do.

For anyone that doesn't know. The 2A12 means 2 amps at 12 volts. The
1AU is 1 amp and does batts from 1.5 up to 24v.

That 2A12 is the first in the series and has just proven to be such an
incredible 12v charger!

I'll try to post some vid and pics of this battery and it getting charged.

Hi Aaron,

That's great about the charger.

I am interseted to know if you have measured the output amps to the battery. I know we aren't supposed to but it would be helpfull in understanding how his commercial units are operating. (compared to our home builts)

Cheers,

Steve.

[Aaron]

no output measurements

I am interseted to know if you have measured the output amps to the battery. I know we aren't supposed to but it would be helpfull in understanding how his commercial units are operating.

Hi Steve,

I haven't measured the output of the charger.

[Mavrick23]

2a12

Glad to hear someone is having good results from the 2A12. My personal experience hasn't been so great. Works good for 2 or 3 cycles then the batteries start going downhill.

[Aaron]

battery condition?

Maverick,

What condition is your battery in to begin with?

The battery I'm charging now seemed to just have sitting sulfation but
would normally have been destined for scrap measuring less than a volt.

So for this battery to respond like this, the cells would have to have been
in good shape.

Is it possible you have bad cells?

I have charged many, many batteries with this 1AU - mostly small
AA's, 9v's and lots of gel cells all with incredible results. I've used it on
maybe 6 big batteries and all had success like this except for the one that
was sitting for 12 years or so. The other big batts I had success with
weren't as drained to below 1 volt. I definitely have never seen this
decline over several cycles.

My lawnmower success I discussed in the other thread, which Steve
started as a question to Peter.

Without the 1Au - using stock charger lawnmore has 2X12v 10ah
batts or so...have to check but I could cut the front yard and a small part
of the back and the red light came on (homelite electric mower).
With 1AU, I can mow the entire front and back yard on one single charge!
And it is only down to one of the yellow lights and not red. That is probably
my favorite success because it was the biggest time saver. I didn't have
to wait to charge the mower again before I could finish the yard. These
results were consistent throughout the entire summer and into fall last
year.

[Mavrick23]

2a12

@ Aaron
I have been using older automotive batteries most of which I used successfully with my SSG and solid state energizers for months. Don't get me wrong the first 2 or 3 cycles do wonders for the batteries and I still consider the 2A12 an important tool in my toolbox. After 3 or 4 cycles one of 2 things occurs. Either the load times measured on a cba II start decreasing or the battery will not hold a charge over 10.6 volts indicating a cell has dropped out. I am to the point now that after 2 or 3 charges I shift back to using the SSG and would not consider using it for more than a couple cycles on a new battery.

[Aaron]

1AU Universal Charger

@ Aaron
I have been using older automotive batteries most of which I used successfully with my SSG and solid state energizers for months. Don't get me wrong the first 2 or 3 cycles do wonders for the batteries and I still consider the 2A12 an important tool in my toolbox. After 3 or 4 cycles one of 2 things occurs. Either the load times measured on a cba II start decreasing or the battery will not hold a charge over 10.6 volts indicating a cell has dropped out. I am to the point now that after 2 or 3 charges I shift back to using the SSG and would not consider using it for more than a couple cycles on a new battery.

Maybe Rick can comment if he sees this.

I don't have one of these battery analyzers so can't comment. I only
have a cheap resistive load tester.

But for my test on load draw, what I've done with some of my other
big batts is just power a lamp from an inverter and see how long it takes
until the inverter shuts off automatically...10.5 or 10.05 volts, I don't
recall which one. I have seen consistently that the time it takes to get
down to that shut off voltage was longer and longer and that was always
consistent with good batteries. I can definitely see it with my lawnmower,
but of course there is a plateu where it can't get better.

This current battery I'm charging I only let the lamp/inverter draw battery
down to low 12 v's. Only a couple times so far. I didn't have the patience
to wait for it to get down that low on a 40w load and wanted to get it
recharging overnight without having to be up late to see when the inverter
shuts off and starts buzzing.

I'd actually like to test these car batts with the 2A12 and the bigger
rejuvenators because they're simply more powerful and are more suited
to the car batteries. Every couple months, I'll hook my 1AU to both
my car's batteries and run one charge cycle just to give a little preventive
wake up.

[Aaron]

bigger batts

Battery seems to be back in shape. Charger pushes it to little over 15 volts
and it rests at low 13's when done. It definitely works but the 1AU hums
a little louder than the smaller batteries so it may strain the charger on
anything over 14ah size - I actually think the 14ah is the size of my
lawnmower batts.

Anyway, the 1AU has done wonders for this batt but I think I'll only use
it on my batts up to 14ah size for 12v.

I can't remember what batt capacity 2A12 is meant for but that is the most
affordable charger for anyone and if it is rated for car batteries, then I'd
use that instead of the 1AU for car batts. It will obviously charge faster
and may be better for the bigger batts.

If that charger isn't suited for bigger batts, then the 30a12 or 15a24 is
the way to go.

[Aaron]

Car Battery Rejuvenation video

YouTube - Car Battery Rejuvenation

This is a test using the 1AU to rejuvenate
a car battery. This charger is NOT intended for
car batteries. For car batteries, see the other
chargers at Tesla Chargers | World's Most Efficient, Effective & Advanced Battery Chargers

You can see how many times this battery
after being charged was used to crank over
the engine without hearing any reduction
in the cranking power.

[ashtweth]

Thanks Aaron will update the PDF and page for ALL
do these work in Australia? for example 50 hertz?

Ash