G2Jk - appears to be a Seiko Battery Management IC, or a clone. There is no “G2JK” entry, but Google shows G2JK, G2JS, etc. So the last character code be a variant or temperature qualification code (Consumer, Industrial, Automotive, etc).
| G2J S-8261AAJBD | SEIKO | 6-Pin SNB ((B)/BD006-A | 电源管理ICPower Management IC/PMIC 电池管理Battery Management |
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