I converted two oil lamp decorations to use lithium cells. 2

My wife bought a pair of cheap decorative oil lamp things online with LED flickery flame candles in them. Cute, but the three LR44 cells in there weren’t destined to last long so I figured I’d try to fit something better in there instead. So I got a couple of lithium batteries and charger boards. The boards were TP4056 based chargers but rated at 1A, too high for the 500mAh cell I was using. So I had to change the charging resistor. [That was the fiddly bit](https://i.imgur.com/ccCZJho.png), 0.5mm pencil for scale. That’s an 0402 resistor.

Anyway, that went well, ended up with a charging current of 48mA so I set to work on converting the lights.

[This](https://i.imgur.com/4lYUnqZ.jpg) was the original base plate, [LR44s](https://i.imgur.com/2c4m8CN.jpg) inside the holder. very [dodgy](https://i.imgur.com/pu1JfG6.jpg) looking cells. Popped off the bottom, and it [couldn’t have been simpler](https://i.imgur.com/SwsLskm.jpg) inside. I guess all the clever flickering circuitry is inside the LED itself. That’s good, I don’t have to worry about it relying on the internal resistance of the LR44s if there’s circuitry in there.

So, I opened up the hole a little for access to the [charging port](https://i.imgur.com/H4LRH9b.jpg), shoved [the board](https://i.imgur.com/npaOTFI.jpg) in there, Stuck in in place with [hot glue](https://i.imgur.com/XPQM3nz.jpg), along with the lithium cell, [connected](https://i.imgur.com/MOdF68l.jpg) the LED using the original switch, and yay, [all is well](https://i.imgur.com/lvIxCcl.jpg).

And as a bonus, the charging LED is [visible through the plastic](https://i.imgur.com/cvO3k1F.jpg).

View Reddit by xmastreee – View Source