Why can’t you make the Wyze Night Lights where we can replace the batteries. I don’t want to have to keep worrying about buying another set of lights because they don’t hold the charge very long any more. In fact, I won’t. They are handy, but we should have to ability to replace the batteries. Seems like a way for Wyze to make more money beause we would have to keep buying new light sets. Hope Wyze changes these to replacable batteries. Thanks.
I haven’t tried it, but I am sure it’s not too hard to open up and replace the batteries with new ones. I’m almost tempted to dissect one now.
Has anyone else opened one of these up so we can see how it’s structured and what battery it uses?
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Yep, I take apart everything. 
It’s a wire-soldered LiPo battery. Hold on and I’ll post a pic…
3.7V 300mAh flat cell Lithium Polymer battery, wire leads soldered to circuit board. Replacement is not easy, but doable. Opening the case without breaking the tabs is tricky, to say the least.
I’m impressed that Wyze chose a 3rd lead thermistor design in the name of charging safety. 
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Where did you get the battery?
Thanks,
Craig
I haven’t replaced any of my night light batteries. I just dissect things to see how they work and manufacturers’ choice of components. Mine are a few years old and definitely becoming a pain with frequent recharging, but I’m dealing with it. I have spare whole units for when I finally give up on the originals. You can probably find replacement batteries, but buying single or small quantity is going to be cost-prohibitive.
Oh yeah, I found some more pictures too:
This guy installed a second battery into it:
Shot with the extra battery that is installed. I tied to a common PCB ground for ease, and then spliced into exisiting positive to other battery. I would have tied right at the “+” terminal on PCB, but leads on new battery are shorter.
Looks like that guy just bought a 3.7V replacement with more mAH. It seems like the easiest thing to do would be to cut the wire and twist the new one together, then you don’t have to bother with soldering anything.
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There is plenty of unused space in the housing. Just need to keep replacement battery thickness in check. I’ve seen some 900mAh 3-lead LiPo batteries for sale on eBay for ~$6-$7 dollars each. Not sure where they’re shipped from though. I have 2 boxes of spare night nights, so I won’t be undertaking any mod/retrofit tinkering on this device anytime soon. Maybe someday, I’ll see if 3 rechargeable 1.2V AAA batteries will fit in the housing.
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