And this makes no difference at all - the larger battery can't draw any more current because the charger is constant current, so small battery or large battery, the current will be the same, and is set by the charger (and specifically R3).
And that's not right either !
Specifically R3 is purposed to limit the current available to the battery, not dictate how much current will flow regardless of demand.
As I said yesterday, I'm too much the novice to argue with your theory but I have found the notes I made of the problem I faced .. .. .. .. .
My wife, amongst other problems suffers Dementia which includes a significant short term memory loss so I built these .. .. .. .
.. .. .. .. . the list on the left are her daily tasks and correspond with the buttons on the second remote unit. They are linked via RF so that pressing a button on the remote unit highlights the corresponding number on the main unit. When the question ' Have I had my lunch ? ' arises for the 4th or 5th time, a look at a highlighted number 4 will answer the question.
At the outset, both were powered with 18650 Lipo batteries connected to TP 4056's and whilst prototyping I was using a couple of cheap chinese 750mAh's which when 'on charge' I measured the current at R3 around 320mA.
However, when I finished work, I inserted a good quality 2600mAh Golishi battery and measured the current again to find 852mA. Note - both are within the limit set by TP4056 R3.
My concern .. .. where is that 852mA's coming from - the USB connection ?
Research suggested that most PC mounted USB outlets (USB 1 & 2) are limited to 500mA; some USB 3 are capable of 900mA and some Superspeed are capable of much more, but my luck always dictates working to the worse case scenario, so I changed R3 to limit current to 450mA.
That was what I was alluding to yesterday !
I don't understand much of technical stuff you guys expound at the drop of a hat, but I'm do know when I'm up the cut in a punt !
MM
Edit: Too many 0's .. 750mAh, not 7500mAh