A product that I recommend

Negative:
- It is a little bigger and a little heavier, Lideal is to put it in a bag if you're traveling or on the desktop.
- The package is provided without charging cable, that's why people do not come much to load must respect the INPUT, do not use any charger that you find at home because it may be the 800 ca mAh and really take time to recharge the battery

Positive:

- 3 USB ports simultaneously, it's really very convenient.
- The short-circuit when a cable is short-circuited and you connect it to the external battery, the battery is protected. already had this problem with my lightning cable and external battery.
- Quality / price: BON
- Solid and highly resistant plastic.
- Several colors available

Improvement:

- Set the schedule of the LED or external battery lamp
- A small screen:
- To display the remaining percentage of the external battery to replace the blue LED 4
- To indicated that the battery is charging correctly
- A box design more because you can easily take to an external hard drive