BSI
From CPKB - Cell Phone Knowledge Base
Battery Size Indicator
Some of the DCT3 & DCT4 series mobile phones use to identify the kind of used battery.
It is connected to resistor to GND. It can be determined which kind of NiMH battery or Li-ion battery is in the phone.
Nokia NiMH batteries:
- BMC-2 640mAH 3.3 kOhm
- BMC-3 900mAH 5.6 kOhm
Nokia Li-Ion batteries:
- BLB-2 650 mAH 68 kOhm
- BLC-2 900 mAH 75 kOhm