Can I Jumpstart A Completely Dead Battery. If the alternator is starting to go bad it cannot charge the battery as efficiently. And much better than jumper cables.

On the other hand an alternator that is undercharging can cause your cars exterior lights to be dimmer than normal. If the alternator is starting to go bad it cannot charge the battery as efficiently. As mentioned earlier the alternator charges the battery while it supplies the rest of the car with electricity.
If the alternator is starting to go bad it cannot charge the battery as efficiently.
Having purchased this primarily as a jump starter I can confirm it works. And much better than jumper cables. If the alternator is starting to go bad it cannot charge the battery as efficiently. Because the battery was completely drained it took a good 15 minutes to get the car started I have a 35L and donor vehicle was a 4Runner.
