It can be professionally replaced.
It may be that the battery is starving to death or the battery is broken, or the motherboard is faulty. You can first simply exclude, disassemble and disconnect the battery, use 3v power supply to bypass the protection board to connect to the positive and negative terminals of the battery, pay attention not to connect to the wrong, charge for a period of time until the voltage reaches 3v, install the battery back to the motherboard, use the charger to connect the charging port to charge, generally can return to normal. If not, it may be the motherboard fault, this is more troublesome, need to use a multimeter and other professional tools with schematic analysis and investigation, no professional knowledge is best not recommended to try