Grill with battery power system and measurement

1. A portable food-heating device, comprising:

a clip configured to removably connect to a first primary power source,

wherein the portable food-heating device is configured to electrically connect to a second primary power source, and

wherein electrical connections between the clip and the first primary power source reverse polarities to charge the first primary power source when the portable food-heating device is powered by the second primary power source.

2. The portable food-heating device of claim 1 , wherein the first primary power source comprises a direct-current power source and the second primary power source comprises an alternating-current power source.

3. The portable food-heating device of claim 1 , further comprising a user feedback system configured to relay information regarding the first primary power source to a user.

4. The portable food-heating device of claim 1 , further comprising a secondary power source that supplies power to the portable food-heating device when the portable food-heating device is not being powered by the first primary power source or the second primary power source.

5. The portable food-heating device of claim 4 , wherein the second primary power source is configured to at least partially charge the secondary power source while simultaneously providing power to the portable food-heating device during use.

6. The portable food-heating device of claim 1 , wherein the clip is removably secured to the first primary power source.

7. The portable food-heating device of claim 1 , wherein the first primary power source comprises one or more batteries.

8. The portable food-heating device of claim 1 , further comprising an upper compartment and a lower portion below the upper compartment, wherein the clip is located on a surface of the lower portion.

9. The portable food-heating device of claim 1 , further comprising another clip configured to receive a third primary power source but not the first primary power source, wherein the clip is configured to receive the first primary power source but not the third primary power source.

10. The portable food-heating device of claim 1 , further comprising a controller configured to operate the portable food-heating device to prevent a temperature of a food item within the portable food-heating device from falling below a minimum food-safe temperature.

11. A portable food-heating device, comprising:

a connection feature configured to electrically connect to a primary power source, the connection feature comprising a clip;

a temperature probe configured to measure a temperature of a food item within the portable food-heating device; and

a controller configured to operate the portable food-heating device to prevent the temperature of the food item from falling below a minimum food-safe temperature;

wherein the portable food-heating device is configured to electrically connect to an additional primary power source; and

wherein electrical connections between the clip and the primary power source reverse polarities to charge the primary power source when the portable food-heating device is powered by the additional primary power source.

12. The portable food-heating device of claim 11 , wherein the minimum food-safe temperature is 145 degrees Fahrenheit.

13. The portable food-heating device of claim 11 , wherein the primary power source comprises at least one of a generator, batteries, and direct-current solar cells.

14. The portable food-heating device of claim 11 , further comprising a secondary power source that supplies power to the portable food-heating device when the portable food-heating device is not being powered by the primary power source.

15. The portable food-heating device of claim 11 , wherein the primary power source is compatible with at least one other device so that the primary power source can be connected to the at least one other device to power the at least one other device.

16. The portable food-heating device of claim 11 , further comprising a user feedback system configured to relay information to a user regarding the primary power source, wherein the primary power source comprises a direct-current power source, and wherein the information comprises a duration of time remaining before the direct-current power source runs out of power.

17. The portable food-heating device of claim 16 , wherein the user feedback system is configured to minimize power consumption of the portable food-heating device responsive to a user signal to maximize remaining time left before the direct-current power source runs out of power.

18. A method of powering a portable food-heating device, comprising:

receiving a first primary power source being a first type of power source via a clip on the portable food-heating device, the clip configured to connect to multiple types of power sources;

relaying a notification regarding the first primary power source to a mobile device;

determining whether the first primary power source is connected to the clip;

activating a secondary power source to power the portable food-heating device while the first primary power source is disconnected from the clip; and

receiving a second primary power source via the clip, the second primary power source being a second type of power source different from the first type of power source of the first primary power source.

19. The method of claim 18 , further comprising minimizing power consumption of the portable food-heating device responsive to a user signal, wherein minimizing power consumption of the food-heating device comprises maintaining a food-safe air cooking temperature within the portable food-heating device.