Welcome John,
I’m concerned that you have actually renewed two components due to it being suggested on here that they could be suspect. From my point, and I think the majority of responders on here, possible culprits are suggested on a test/confirm suspect/eliminate basis.
Did you confirm that both the battery and sensor were ar fault before you renewed them?
I am sorry to hear that you are still have problems, and one question I would ask is - have you had the alternator output checked.
Please John, I’m not suggesting that you change it! Just get the output checked.
Perhaps you could let us know how you get on.
Kind regards,
Gareth.