Here is a concise summary of the text:
**Title:** Troubleshooting a Dead Car Battery with Unconventional Jump-Starting Methods
**Summary:**
* The creator's car battery dies frequently, and they attempt to jump-start it using unconventional methods.
* Initial attempts with a "super cap" (pre-charged to 14V) and a small 12V battery fail due to the car battery being deeply discharged (0.7V).
* After multiple trial and errors, including burnt alligator clip wires, they finally succeed in jump-starting the car using a 12V drill battery in series with the small battery, increasing the voltage to 15-16V.
* Surprisingly, the car battery, which was thought to be dead, recovers and holds a charge after the car is run for 15 minutes.
* Investigation reveals that a likely cause of the deep discharge was leaving a ceiling light on, which draws around 0.8A of current, depleting the battery over a couple of days.
**Outcome:**
* The car is successfully jump-started and the battery recovers.
* The creator identifies the probable cause of the battery drain and advises viewers to turn off car lights to prevent similar issues.
Here are the key facts extracted from the text, without opinions, in short sentences with numbers:
1. **Initial Car Battery State**: The car battery was completely discharged, with no lights or functions working.
2. **Initial Battery Voltage**: The battery voltage was measured at 0.7 volts.
3. **Jump-Starting Attempts**: Multiple attempts were made to jump-start the car using various methods.
4. **Equipment Used**:
* A "super cap" (charged to 14 volts)
* An extra 12-volt battery ("puny battery")
* Alligator clips
* A meter for voltage measurements
* Later, a 12-volt drill battery
5. **Observations During Attempts**:
* The voltage jumped to 12 volts initially with the extra battery, but decreased over time.
* The super cap was discharged to 5 volts after one attempt.
* Alligator clip wires burned due to high current, but still partially functioned.
6. **Successful Jump-Start**:
* The car was finally started after connecting the drill battery in series with the "puny battery", increasing the voltage to 15-16 volts.
7. **Battery Recovery**:
* After running the car for 15 minutes, the battery could be restarted multiple times, indicating it was not dead.
8. **Current Draw Measurements**:
* Baseline current draw from the battery: around 0.3/0.4 amps
* Current draw with car locked: 0.2/0.1 amps
* Current draw with one ceiling light on: around 0.8 amps
9. **Conclusion on Battery Drain Cause**:
* Leaving ceiling lights on for an extended period (couple of days without driving) likely caused the deep discharge.