I'm designing a Li-Ion battery charger circuit with a bq24702 chip. I will use it with two Li-Ion batteries connected in series. In order to protect the batteries from over discharging, I have to know, when is the battery discharged. I will use Tensai Li-Ion TR-26650LI batteries. In the specification is written: "When discharged at 0.2C to 2.75V at 20°C". Does this mean, that it is not recomended to discharge a battery cell under 2.75V?
This would mean, that I could only use the battery between 0.2C and 1C, so I could use effectively 4500 mAh – 900 mAh = 3600 mAh. This would be not sufficient for me.