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Swagway Teardown

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  • Speaking of the protection board: this is a Shenzen Dalishen Technology DDJ10A9.

  • The board in their product photo got a much better soldering job than ours.

  • The four large components are MOSFETs (by GuangDong Mosfet Semiconductor Co., Ltd.) responsible for charging and discharging, and have pretty skimpy solder joints.

  • So far this is the only sketchiness we’ve seen, although it is a bit concerning. These particular solder joints are going to see a lot of power as the battery is charging and discharging.

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