Leviton SmartlockPro Programmable Electronic Timer Switch With Astronomical Clock Wont Keep Time After Power Outage

[KYBOSH]

Model number VPT24-16Z.
https://leviton.com/products/vpt24-16z

I have 3 of these in my home for over 10 years now and Im planning on replacing them as I lean towards a Philips Hue home setup.
They are great units but they lost the ability to keep/store the time and settings after power outages and brown outs.
I knew it was a battery in there somewhere but never got around to looking into it.
Well an opportunity came for me to remove this from its home in my wall so I disassembled it to see what was going on.
I found a 3.6V LIR1632 battery spot welded and nestled in there.


I think i will replace all the batteries and put them up to give them a good home.
This is good excuse to get a good LiON spot welder i have been meaning to procure.

[stj]

those come with the tabs on them - a spot welder will generate too much heat in something that small
if it was me i'd fit a socket/holder anyway

[KYBOSH]

those come with the tabs on them - a spot welder will generate too much heat in something that small
if it was me i'd fit a socket/holder anyway

It maybe possible to fit a holder in here but I think these werent designed to last a lifetime and thus no one would think the end user would attempt to replace the battery.
Alternatively I could run a wire from the leads to holder which resides off the PCB. Then it would be semi servicable without the need to totally disassemble the unit every 5 years.

[CapLeaker]

Doesn't have to be a coin cell. Here in Canada we can't get readily replacement Li-Ion coin cell with tabs, unless one is willing to fork over $100. Since then, I modify the battery to whatever works for me and can get cheap batteries for. I've done anything from swapping out batteries to put coin cell holders and regular CR2032's and installing a small flat pouch battery. As long as there is room, go for it.

[stj]

those arent 3v, they are 3.6v rechargeable.

[CapLeaker]

those arent 3v, they are 3.6v rechargeable.

So is a small Li-Ion pouch battery. Like I said, anything that fits goes in there. Off course you have to see if it is rechargeable circuit or not, then choose accordingly.