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A Power Bank 4000mah is sufficient to completely recharge mobile phones.

  • Small and easy to carry in your pocket or bag.
  • A premium colbalt 18650 battery is used. Capacity:4000mAh.
  • Input Voltage:5V 1A.
  • Output 5V 1A.
  • Certifications: CE, RoHS & FCC .
  • Size 4.1" x 2.7" x .4" 105mm x 68.3mm x 9.8mm

For essential urban gear, the Power Bank 4000mah is flat and small. It also has enough power to completely recharge smart phones. The cord and the connector tips for both microUSB and the Apple Lightning are built in. Use as an iPhone charger, a Samsung Galaxy phone charger, tablets, digital camera and other digital devices.

With the MicroUSB connector tip you can use it as Galaxy Phone Charger. Put the little Lightning converter on and use it as a iPhone Charger.

4000mah means?

mAh means milliamp hours (1000 milliamps = 1 amp). Therefore a 4000mah means 4 amps of total current inside the battery. For most mobile batteries that use lithium cobalt electrodes, this number should be multiplied by .8 or 80% because the phone will shut off and show empty when the battery voltage falls to 3.0 VDC. Therefore, the deliverable current is actually 3200mAh. The shut down voltage of 3 VDC leaves a little charge in the battery for emergency mode as well as enough current so the charging circuit can read the battery.

How do I use a Power Bank 4000mAh?

Unplug the connector tip from it's holder on the case. Plug the connector into your phone or tablet and start charging. If you have an iPhone, there is a lightning connector tip in the adjacent socket.

How do you charge a Power Bank 4000mAh?

Use a wall adapter or USB port and the included mirco USB cable to re-charge your power bank charger.

How many hours does it take to re-charge?

It will recharge in 2-3 hours with a 1 amp wall charger.

How long does a Power Bank 4000mAh battery last?

It will provide more than 500 cycles of charging discharging for several years and keep this capacity for about 2 years.

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