Hi,
We are currently seeing problems to charge in RT, at least with some units. Investigating what might be the reason we read REG09. Typically for those units we then see REG09 = 0x95 or 0x85 for the first read, followed by 0x05 for repeated readings. My understanding is that that means the charger is seeing the battery as 'cold', in turn meaning <0 degrees C with default TS resistor values (which we are using). Measuring the NTC resistance at the battery TS terminal I get 9.6 kOhm, so it seems to be reporting RT, while cold would be much higher.
Question 1: Would you interpret 0x05 differently?
Trying to make sense of this result I asked a colleague what he was seeing on his units, as a reference. He is seeing 0x37, which is not even defined in the datasheet.
Question 2: Does 0x37 mean something?
Thanks!