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  1. shinmolina

    Zishan Z4 - DAP with Dual DAC ES9038Q2M | Dual AMP OPA1622 | USB 32-bit + DSD | Bluetooth LDAC 24-bit | Balanced 2,5/4,4 | LO/PO 3,5mm

    Have you measured the voltage across the battery pins with the new one installed? I once managed to kill a battery while soldering it onto a PCB. See if the voltage is too low.
  2. shinmolina

    Zishan Z4 - DAP with Dual DAC ES9038Q2M | Dual AMP OPA1622 | USB 32-bit + DSD | Bluetooth LDAC 24-bit | Balanced 2,5/4,4 | LO/PO 3,5mm

    You can search for a similar battery at Aliexpress. Measure the one you have in your Z4 and check the dimensions before buying. I have found this one, check if it fits the Z4. You have to unsolder the one it has now and solder the new one to the pads on the PCB. Have you been using your Z4 a...
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