Cox Battery Project

FSTP Tue Apr 13, 2021 11:50 am

Here is a quick little project I threw together. I always loved the aesthetics of the cox 1 1/2 volt "Super Starting Power Battery". Since they're all so old now non of them would have a charge obviously. So I decided to make a little insert that I could place in the battery box so I can still have the old look of the original battery but still have it be useful when I take it to the field.

I started by making a small plastic try insert out of modeling styrene.

Then I got a DC to DC adjustable buck converter and calibrated it for a 1.5v output.

After that it was a simple installation of all the parts. I did add some tungsten weights to the bottom just to give it a bit more heft and stability.

Finally the finished project:

I'm sure this is a common project in the cox community but I just thought I'd share my version.

Marleysky Tue Apr 13, 2021 12:15 pm

Very nice job there FDTP! If you look under the “instruction sheets” file on the LH side of this page, hi can scroll down to our creative printing of Levent Surberk’s and print out a copy of a couple of different battery packs!
Just out of curiosity how did you attach the wire connections to the styrene box? Also is there a part number for that buck/boost thingy?

FSTP Tue Apr 13, 2021 1:05 pm

Thank you! to connect th escrew terminals to the Styrene box I just used CA. You have to give the styrene and the metal tab a good sanding to give the two surfaces a nice roughness for an optimal bond. You'd be surprised how strong it ended up being. But styrene and CA work really really well together. For the little DC-DC adjustible Buck converter I used this little guy :
Buck Converter . I've used them in other projects and they work really nicely.

I didn't know about the other printable batteries, thanks!

davidll1984 Tue Apr 13, 2021 2:31 pm

From memory I dont think I have already seen other than me who made it for my 9v batry to keep all the original parts in my radio controls a very good project very well done the day I find one I will surely do the same i like Thumbs Up

Jason_WI Tue Apr 13, 2021 4:30 pm

Looks nice. You will want to add a low voltage cutoff for the lithium battery of 3V per cell. Go below 3V during discharge and the battery can be damaged.

Levent Suberk Tue Apr 13, 2021 6:19 pm

A lipo battery alarm will be good. Nice work Very Happy

Levent Suberk Tue Apr 13, 2021 6:23 pm

Battery box reproduction examples:

https://www.coxengineforum.com/t11734-cox-battery-reproductions?highlight=Battery+box

Templates can be find at INFO > Instruction Sheets page.

OhBee Tue Apr 13, 2021 6:24 pm

I like!...but I am an electronics moron... Sad

getback Wed Apr 14, 2021 7:14 am

Nice job on the starter box , i been wanting to make me one of these , What kind of soldier did you use on the batteries ? Do you print the one in instruction sheets out on poster paper ? Levent )

FSTP Wed Apr 14, 2021 11:01 am

Thanks for the nice replies. I'm not to worried about cell health with this battery. I have testers and I have several of the exact same kind of alarms Levent posted. I also don't intend to leave the lipo in the box just plugged in all the time. Its Velcro'ed in so I can easily remove it. I thought about adding an external on/off switch but I didn't want to cut into the original cox box. Its old
and nice as it is.

As for what solder I used it was/is just your run of the mill rosin core 63/37 0.8mm solder.

Now that I know about the battery graphics that are available I think a cool project would be to make a USB power bank pack that looks like a Cox battery.

Levent Suberk Wed Apr 14, 2021 12:46 pm

FSTP wrote:Thanks for the nice replies. I'm not to worried about cell health with this battery. I have testers and I have several of the exact same kind of alarms Levent posted. I also don't intend to leave the lipo in the box just plugged in all the time. Its Velcro'ed in so I can easily remove it. I thought about adding an external on/off switch but I didn't want to cut into the original cox box. Its old
and nice as it is.

As for what solder I used it was/is just your run of the mill rosin core 63/37 0.8mm solder.

Now that I know about the battery graphics that are available I think a cool project would be to make a USB power bank pack that looks like a Cox battery.

You did find a genuine box, hard to find one.

USB power bank is a nice idea Very Happy

crankbndr Wed Apr 14, 2021 4:03 pm

Jason made some very nice repros and generously gifted me one. I haven't made it hot but has a spot in my tether car collection.
Thanks you Jason!!

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