What does the gizmo look like

[Geo-TH,In]

Where is the gizmo that turns off a
lithium battery charger when the battery
is fully charged?

Where is the gizmo that stops a battery
from discharging past a certain voltage?

What does the gismo look like?

Please post a picture.

Is it the white thing in the picture that
has 3 LEDs that measure the voltage when
you push on the switch ?

 

[1948CaseVAI]

It's not a "gizmo" (whatever that means. It is a carefully engineered circuit board. As they say, not "user serviceable."

 

[Janicholson]

The charger has the gizmoes that control charging and the discharge curve is nearly horizontal until near exhaustion at which point the tool quits. Jim

 

[wore out]

GOOGLE ''Lithium battery pack protection module''.

https://www.amazon.com/Comidox-Protection-Anti-Overcharge-Over-Discharge-Over-Current/dp/B07J9NXQ6W

https://www.batteryjunction.com/pcb.html

A couple of generic products for DIY battery pack builders are linked above.

 

[Geo-TH,In]

It is possible Dewalt is hiding it under the
cells.

I had 6 cells at a lower voltage than 4 other
cells.
I slowly charged the 6 cells, brought them up the
the same voltage as the other 4 cells and now the
battery is taking a charge and shuts off when the
voltage gets to 20.6. It should stop charging at
21 volts and stops discharging the battery at 18 volts.

I'm discharging the battery with a flashlight,
very slowly.
So far the voltage is 19v.
I would like to know if it shuts off at 18v and
then takes a full charge.

 

[Caryc]

(quoted from post at 15:12:02 07/20/23) It's not a "gizmo" (whatever that means. It is a carefully engineered circuit board. As they say, not "user serviceable."

You never heard of a gizmo? I grew up back east and according to my Dad there were gizmos all over the place.

 

[chuckthin]

George , I have one I can bring over. I'll call Friday.

 

[HFJ]

(quoted from post at 20:28:36 07/20/23)

(quoted from post at 15:12:02 07/20/23) It's not a "gizmo" (whatever that means. It is a carefully engineered circuit board. As they say, not "user serviceable."

You never heard of a gizmo? I grew up back east and according to my Dad there were gizmos all over the place.

https://www.youtube.com/watch?v=Ok4nGFhxAyI

that's a very cool gizmo. jimmy page agrees.

 

[Loosehandle]

Glad to see you've got a fire extinguisher handy....

 

[Geo-TH,In]

I slowly charged the 6 cells that measured 11.63 v.

This is a pic when I began charging at 1 amp.

After charging the 6 cells the total voltage was 20.61v.

The battery starting working. So the gizmo woke up and started working.

 

[chuckthin]

if you want a picture of gizmo goto amazon search 18650 battery charger 20 pages of pictures.

 

[BarnyardEngineering]

If there is no board in the battery itself, the "gizmo" is in the charger and the tools.

Notice that your Dewalt batteries have several connections, not just a + and a -.

This is why your adapters are a problem. They don't have the "gizmo" to prevent your batteries from getting messed up.

 

[DoubleO7]

(reply to post at 16:30:20 07/20/23)

Where is the gizmo that turns off a
lithium battery charger when the battery
is fully charged?


It is always immediately downstream of the Thing-A-Ma-Jig and upstream of the Whatchya-Ma-Callit.

 

[Geo-TH,In]

Thanks for the charger and an education on Li batteries

 

[Caryc]

(quoted from post at 07:18:00 07/21/23)

(reply to post at 16:30:20 07/20/23)

If I remember right, it's pretty close to the wheematrackle.

 

[guido]

You asked me a question



Guido.