+---------------------------------------------+ | [B+] [C1/C2] [C3/C4] [TH] [B-] | | Battery Balance Balance Thermal Battery| | Positive Cells Cells Monitor Negative| | (+) 1-2 3-4 (NTC) (-) | | [ ID ] | | Battery | | Type ID | +---------------------------------------------+

The transformer is a central component of the power supply stage in these chargers. While a single official datasheet for just the transformer is rare, you can find the complete board schematics where this component is integrated:

This comprehensive technical guide serves as a functional map and troubleshooting schematic for repairing or converting the PBM27A-210(MV)-R printed circuit board. Understanding the PBM27A-210(MV)-R Topology