Battery
Information about the battery pack and BMS

Surface RT battery pack with exposed BMS circuit
Specifications | Title |
Manufacturer | Samsung |
Capacity | 31.5Wh |
Voltage | 7.4V |
Model number | P21GK3 |
A battery pack requires a reliable BMS. Without it you can't control and balance the cells, leading to fire hazards.
Overview
BMS
Cable



BMS board part 1
BMS board part 2
BMS board part 3
BMS board part 4
Cable





Chip 1
Chips 2
Chip 3
Chip 4

10 Amperes SFH Series Self Control Protector(SCP)

??? - Guessing both are balance chips

BQ28400 Netbook and Tablet Lithium ion gas gauge and protector

??? - Chip is unmarked, suspecting it's a temp probe logic
Last modified 1yr ago