Galaxy Phone Charger
Small and credit card size plus depth, it is easy to carry. I carry my Power Bank 4000mah in my front pocket and charge my Galaxy S7 on my way to work if I have forgotten to charge my phone the night before. The built-in cable is very convenient and neatly tucks away when you are not using it. Attached at the end of the short cable is a micro-USB tip which fit all phones except those with the C connector. For Apple phones, there is an extension lightning tip.
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.