Yep, that’s probably the best thing to try.
If you have a working USB connection and the tools.
Good advice @Eric_Crochemore 
I’m trying but watch isn’t being detected. It just shows the logo on watch face. SP flash tool does not see the watch which itself switches off while still connected via USB to laptop. It will randomly then start vibrating with screen off for a minute and then go silent. There’s life in there, so will see what battery disconnect does.
You’ll find all needed tools and the latest firmware at the beginning of this post:
-Android 11 is here! Lokmat APPLLP 4 Pro and LEM16 Z40 models
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You can flash your watch during a reboot if you have installed the drivers, loaded the firmware and clicked on the download / flash icon.
Even if battery is low, it will flash.
I’m not sure if it will fix your charging issue but worth trying.
Make sure you do not use the charging dock if you have one.
Has to be flashed using the cable directly attached to the watch.
Once completed, disconnect the watch and then reconnect it to charge.
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Thanks. I will download the tools and firmware suggested by @G1NT0N1C and give it one last shot. The battery disconnect, connect did not work.
@G1NT0N1C I have downloaded the LEM 16 zip file and on extracting all I get is a 4GB LD_C18_TFT64_Natv-user-gms_sharkl5_SUPER_R.pac file with a Chinese text document and no firmware or tools
That’s exactly what you should get.
Once you have installed the drivers and loaded that pac file in the unisoc flash tool, you can flash it.
As @G1NT0N1C says, it’s a little bit different to MTK fw files.
All the images are packed in the pac file, which is signed and prevents mistakes.
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We’re sorry. You can’t access this item because it is in violation of our Terms on of Service. on trying to download Unisoc tool
Strange. We will check it. Thank you.
3rd attempt
Doesn’t look like you have followed the process…
Waiting for input means that you didn’t press the back button in time.
Please read the instructions.
Same as LEP (as mentioned in the main Android 11 thread)
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The Lem16 instructions say " Power off the watch, connect USB cable to the watch and then press and hold the back button to enable watch flash mode and connect the other end of the USB cable to your PC.". So the back (lower) button has to be pressed before connecting and pressing the download button on the tool as i understand it. The LEM P instructions say to press the top button instead. So this time i will press the top button. Thanks for your input
Yep, that’s because you use the back button.
LEM P back button is the opposite, but I wanted you to know that this was the issue.
Thanks for your input.
Is the MTK Flash Tool recommended? Unisoc is now totally unresponsive after trying several times using the exact procedure described. I upload the firmware nicely, press the download button, hold the bottom button and then connect usb to laptop.
Oddly enough, the watch while disconnected will randomly switch on while unattended and show the logo until i eventually switch it off. It will also out of nowhere start vibrating while the screen is blank until i press the off button 
MTK flashtool won’t work because the LEM16 has a spreadtrum chip.
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Did you install the unisoc drivers?
This is very strange behaviour indeed, if you have the drivers installed.
You may need to disable windows driver signing to get them to install correctly.
I don’t think the drivers are signed with a Microsoft certificate.
Once you have checked that, try different USB ports.
If none of this works, you will have to return the watch to the seller or contact lemfo after sales support.
Unisoc drivers installed successfully (i did it twice). I will check certification issue. Maybe uninstall and look for proper ones. I have tried different ports. Will update.
Unisoc drivers are very unlikely to ever be signed by Microsoft.
Even Google prevents me from sharing them and the flash tool because they are never certified.
You have to go to advanced windows start up and disable driver signing and then install them.
Hovatek website / forum is a great resource for flashing phones and watches.
Drivers, tools and “how to” videos etc…
Well worth visiting.
A helpful tip from my experience is to use the “research tool”
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