Has anyone had experience with "recharging" these button batteries?
The factory cells are standard, non-rechargable lithium batteries.
From what I am researching, these batteries are advertised as "Rechargeable Lithium 3.0V coin battery"
Are the factory ones the same?
You say "these" but I am not sure what you are comparing to..
Seems a much simpler option would be to recharge the existing battery.
Not really. The difficulty is getting to and removing the sensor- either with a wheel unmount/tire removal, or the clamp method. Even if they were rechargeable, you would still have to do all that, plus opening and resealing the sensor. And, typically rechargeable cells are not a long-lasting as non-rechargeable. The only step you would save is un/resoldering but at the "expense" of having to wait several hours for them to charge.
PS, attempting to charge non-rechargeable lithium cells is dangerous....
What would have been fantastic is that the batteries SHOULD be chargeable and through contacts on the valve stem. That removes all the complexity and expense. Imagine just once a year plugging something onto the stem for a few hours to top up the batteries.
