2 Pack Sensor Solar Light with Remote Control, Junk Item, Security Camera Type, Outdoor Waterproof

This is a set of solar lights with sensors, sold as-is (junk).
I purchased them from Temu.
I left them in the sun for 3 days, but neither of them lit up at all.
I tried to open one up to replace the rechargeable battery, thinking it might be degraded (see 4th image), but the rechargeable battery was attached with solder (?). Since I couldn't handle it, I gave up.

I'm sad that 2 out of the 4 I bought don't work. (But it's Temu, so I guess it can't be helped.)
Would anyone who is knowledgeable or able to replace soldered parts be interested?
Also great for parts!
They come with remote controls, making it easy to change settings even when installed in high places.
These are unused items that have only had their batteries charged and have never been installed.

?Solar Light Set Contents
?2x Main Units (will not turn on even after charging in the sun.)
?2x Remote Controls (batteries are included and still have the insulation sheet attached.)
?2x Mounting Arms
?2x Screw Sets (with anchors.)
?1x Instruction Manual-like booklet (entirely in English.)
?1x Box (originally in rough condition with English markings.)

※Images 1-4 show the actual items.

?Please consider this item understanding that it is a non-working junk item. Thank you.

I will use recycled boxes with bubble wrap and newspaper for cushioning.
Thank you for looking! (??????)???