An apparatus for improving endurance capability of a terminal, comprising: a heat collection module, configured to collect heat generated by heating electronic components within the terminal; a thermoelectric conversion module, configured to convert collected heat into electrical energy and transport the electrical energy to a storage capacitor module; a storage capacitor module, configured to store said electrical energy, and output a stable output voltage value; a comparator module, configured to: when said output voltage value exceeds a preset reference voltage value, generate and send a charging enable signal to a power management module; and a power management module, configured to charge a terminal battery based on said charging enable signal; wherein, said storage capacitor module comprises a first unilateral diode, a current limiting resistor, a storage capacitor and a regulator that are successively connected in series, wherein an anode of said first unilateral diode is connected to the heat collection module; said comparator module comprises a first enable switch, a second enable switch, a comparator, a second unilateral diode, a booster, and a multiplex voltage selection switch, wherein a first input end of the first enable switch is connected to an output end of the regulator, and a second input end of the first enable switch is connected to an output end of the power management module, an output end of the first enable switch is connected to a negative input end of the comparator as well as a first input end of the second enable switch, a positive input end of the comparator is connected to a output end of the multiplex voltage selection switch, and an output end of the comparator is connected to a second input end of the second enable switch as well as a first input end of the multiplex voltage selection switch, and an output end of the second enable switch is connected to an anode of the second unilateral diode, and a cathode of the second unilateral diode is connected to an input end of the power management module, and a second input end of the multiplex voltage selection switch is connected to one end of the booster, and the other end of the booster is connected to an anode of the terminal battery, and a third input end of the multiplex voltage selection switch is connected to the anode of the terminal battery; wherein the second input end of the first enable switch connected to the output end of the power management module is an enabling input of the first enable switch, the second input end of the second enable switch connected to the output end of the comparator is an enabling input of the second enable switch, an output of the comparator to the first input end of the multiplex voltage selection switch is used as a selection signal. a heat collection module, configured to collect heat generated by heating electronic components within the terminal; a thermoelectric conversion module, configured to convert collected heat into electrical energy and transport the electrical energy to a storage capacitor module; a storage capacitor module, configured to store said electrical energy, and output a stable output voltage value; a comparator module, configured to: when said output voltage value exceeds a preset reference voltage value, generate and send a charging enable signal to a power management module; and a power management module, configured to charge a terminal battery based on said charging enable signal; wherein, said storage capacitor module comprises a first unilateral diode, a current limiting resistor, a storage capacitor and a regulator that are successively connected in series, wherein an anode of said first unilateral diode is connected to the heat collection module; said comparator module comprises a first enable switch, a second enable switch, a comparator, a second unilateral diode, a booster, and a multiplex voltage selection switch, wherein a first input end of the first enable switch is connected to an output end of the regulator, and a second input end of the first enable switch is connected to an output end of the power management module, an output end of the first enable switch is connected to a negative input end of the comparator as well as a first input end of the second enable switch, a positive input end of the comparator is connected to a output end of the multiplex voltage selection switch, and an output end of the comparator is connected to a second input end of the second enable switch as well as a first input end of the multiplex voltage selection switch, and an output end of the second enable switch is connected to an anode of the second unilateral diode, and a cathode of the second unilateral diode is connected to an input end of the power management module, and a second input end of the multiplex voltage selection switch is connected to one end of the booster, and the other end of the booster is connected to an anode of the terminal battery, and a third input end of the multiplex voltage selection switch is connected to the anode of the terminal battery; wherein the second input end of the first enable switch connected to the output end of the power management module is an enabling input of the first enable switch, the second input end of the second enable switch connected to the output end of the comparator is an enabling input of the second enable switch, an output of the comparator to the first input end of the multiplex voltage selection switch is used as a selection signal.