deji portable power bank kingleen portable power bank charger 3000mah Christmas Gift Power Bank Built in Micro USB Cable

1. Q: What are the Difference between Lithium Ion and Lithium Polymer?

A: Lithium ion:

*The lightest of all metals

*The greatest electrochemical potential

*The largest energy density for weight.

*The load characteristics are reasonably good in terms of discharge.

*The high cell voltage of 3.6 volts allows battery pack designs with only one cell versus three.

*It is a low maintenance battery.

*No memory and no scheduled cycling are required to prolong the battery's life.

*Lithium-ion cells cause little harm when disposed.

*It is fragile and requires a protection circuit to maintain safe operation.

*Cell temperature is monitored to prevent temperature extremes.

*Capacity deterioration is noticeable after one year (whether the battery is in use or not).

A: Capacity is the measure of the energy stored in a battery. This is shown in the Ah (Ampere hour) or mAh (milli-Ampere hour), capacity defines the ability of a battery to perform under a specified discharge criteria

4. Q: What is self-discharge?
A: The loss of capacity in a battery due to internal chemical reactions. Self- discharge will occur within all batteries and is influenced by temperature. Self-discharge occurs no matter if the battery is connected to your device or not.

5. Q: Do batteries self discharge when not in use?
A: Yes, all batteries self-discharge. The rate of discharge depends on the type of battery and the storage temperature.

6. Q: What is cut off voltage?
A: The voltage at the end of a useful discharge. Cut off voltage will vary by device. However, the cut off voltage for a device specifies the inoperable point for the device utilizing battery power.

7. Q: What is a Cycle?
A: A cycle is considered one discharge and one charge sequence for a rechargeable battery

8. The voltage of Power Bank?
 A: The devices with input voltage of 5V, 1A: iPad, iPhone, iPod, smart phone, MP3, MP4, PSP, digital camera, GPS etc.
The devices with input voltage of 8-12V: tablet computer, video camera, SLR camera etc.
The devices with input voltage of 12-24V: laptop computer.