I”ve been asking after ( in another so far unanswered thread) recommendations for a low power solar charger controller, having accumulated some 5 and 7 AH cells from UPSes. I noticed while searching that almost all of the charge controllers for sale except the very cheapest incorporate a temperature sensor on a cable, meant to monitor the battery and warn against or shut off charging if the battery gets too hot.
It was news to me that some 18650-size chargers have heat sensors. I appreciate the info in this thread — it’s now a feature I know to look for.
Of course, a test result showing that the heat sensors work would be even more welcome. Has HKJ mentioned this feature anywhere?