I am seeking recommendations for a portable rechargeable battery pack.
- Can safely power tablets and phones (only need 2.1A at once)
- Can reliably jumpstart a large vehicle engine (4.0L)
- As low of a price as possible
- As small as possible
- Has a carrying case (but not willing to pay extra for one)
Note: Costco currently sells such a device for $59.99, but I have been unable to find any reviews of it, nor do I know anyone who has tried one.