A Large car jump starters have been in the market for the past few years. But with advancement in technology even smaller jump starters are becoming more common in the market. The best portable car jump starters are not only designed to fix your battery, but also are designed to convenient and safety.
#Top1 Tattu 12000mah jump starter car battery

Tattu jump starter is a multi-function car jump starter. Tattu portable car jump starter has 12000mAh 12V 400A peak with built-in flashlight. Power supply booster battery for 3.5L Gas and 2L Diesel Engines.

Capacity: 12000mah
Power: 400A peak 12v
Vehicle: 3.5L gas and 2L diesel
Weight: 1.5 lb
#Top2 PowerAll portable jump starter

This little guy had the power to power a 12 volt car or truck. Although this review is all about car jump starters, the PowerAll really powers all.
It has USB ports so you can charge your other electronics like a iPhone or tablet.

Capacity: 12000mah
Power: 400A peak
Vehicle: 4.0L gas and 3.0L diesel
Weight: 1.0 lb
#Top3 Juno power - Pocket-Size Portable Car Battery Jump Starter

Its lithium polymer battery is 6,000mAh and makes enough power to charge any car battery. Juno is another pocket sized jump starter that is necessary for hiking and camping. But the price is to high.

Capacity: 6000mah
Power: 300A peak 12v
Vehicle: 4-Cylinder and 6-Cylinder engines
Weight: 1.4 lb