Convert lamp to lithium

[tyerone]

Hi all I have some old Coleman lamps that take 4 X D batteries, could I convert these to lithium? I know il have to charge the batteries externally

 

[Mars]

How are the batteries connected? ( in parallel, series or a combination of the two).

It would be fun to put a lithium battery in there, just find one with the correct voltage. If you want to get fancy you could also get a charging circuit and build that in and charge it via usb.

Edit: if they are connected in parallel (6v) than you may be even be able to power it with a power bank that outputs 5v.

 

[tyerone]

 

[tyerone]

 

[x7razor]

More than enough space give it some Lithium power

 

[B-1]

You should be able to 3d print a new "power pack" with 2 or 4 18650 lithium cells, charging/balancing board and a DC to DC buck converter inside without too much issue.

 

[tyerone]

could i just take a power bank and use a DC buck converter to up voltage to 6v and then connect it inside, that way its easy to charge the lithium battery

 

[x7razor]

I have used these https://www.robotics.org.za/J5019 for various DIY mods

 

[SauRoNZA]

Can’t you just buy Lithium versions of those exact batteries?

Like these?

https://www.amazon.com/Cell-Batteries-Rechargeable-ECO-Friendly-Recyclable/dp/B07KYK1KCK