Power Bank 4000mAh_1Power Bank 4000mAh_2
4000mah Power Bank
4000mah Power Bank charging a Galaxy S7.

A Power Bank Charger for mobile phones & usb devices.

Continuing the theme of essential urban gear, the Power Bank 4000mah is trick. Not only is it flat and small, it also has enough juice to completely recharge smart phones. "No long cords mom" the cord and the connector tips for both microUSB and the Apple Lightning are built in.

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.

FYI, 4000 mah battery means that this Power Bank has 4 amps or 4000 milliamps in storage. Multiply this number 80 percent or .8 and this equals 3200mamps. This is the actual amount of current available to recharge your mobile phone. 20 percent is retained so as not to completely discharge and making the charging circuit unable to 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.

4000 mah battery how many hours does it take to 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.

A lithium battery has very little discharge when not being used, therefore charge the Power Bank and use when you need it.

Will it charge my mobile phone completely?

Yes, 4000mAh is sufficient to completely recharge mobile phones.

What does 4000mah mean?

mAh means milliamp hours (1000 milliamps = 1 amp). Therefore 4000 mah = 4 amps. This is the measure of available current inside the battery that can be delivered for one hour. 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.
  • Built in microUSB charging cable with both a microUSB tip and Apple Lightning tip.
  • Slim profile makes it easy to carry.
  • Small and easy to carry in your pocket or bag.
  • MicroUSB cable is included for charging and use with all Samsung and all other phones.
  • A premium colbalt 18650 battery is used. Capacity is 4000 mAh.
  • Input Voltage:5V 1A.
  • Output 5V 1A.
  • Certifications: CE, RoHS & FCC .
  • Size 4.125" x 2.7" x .38" or 104.68 mm x 61.42 mm x 0.97 mm


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