There are thousands of power banks on the market, which often confuses the consumers. Some people want to make a big difference with others in appearance or structure while the others go after the price or the capacity of portable power bank, it is attractive for consumers to face a lot of portable power bank with high capacity and lower price, but some people are still worry about the quality of product, how to choose an excellent power bank?
The mobile power bank consists of three parts: the cell, the appearance, the circuit.
The cell is a key feature to a portable power bank, the power bank in the market now often use 18650 or some indipendent cells.
The cell decides the quality of power bank
The circuit board consist of many chips and has the functions of enlargering or shrinking voltage.
The appearance acts as protection as well as cooling.
Every li-ion battery has cell, the cell decides the quality of battery and power bank.
The cells have two sorts: the li-ion cell and the li-polymer cell.
To a power bank or a mobile, Li-polymer power bank has high capacity and is safer than li-ion power bank, which is the consumer’s first choice, but li-polymer cell often comes with high price and lower cost performance.
The control circuit of power bank consists of the following parts:
Li-ion battery manage chip, monitoring the total process of charging.
2.MCU:The intelligent protection circuit in PCB, offering charing protection,dischargingprotection, termerature protection, overcharge protection,etc, which avoids some unstable cases that demage your mobiles.
3,Voltage control chip, change 3.7V battery voltage into 5V output voltage.
Now it is possible that one chip assemble the above three functions.
There are two kinds of shells of power bank: the metal shell and plastic shell,the metal shell often means aluminium alloy shell.
Beside the functions of decoration, the shell of power bank also acts as cooling and protection.
The heat squeeze , puncture may exposion, it is necessory for a portable power bank to have a firm shell, metal shell has more advantages in some special cases including a fire.
To people who have a certain knowledge of power bank, we suggest him/her buy power bank of 18650 li-ion cells , for it is quality with aluminium alloy shell,although it is a bit heavy and doesn’t carry easily.
To some people who want a portable power bank ,we suggest them choose li-polymer power bank,relatively, it is safer.
Overall ,we suggest people choose power banks from authorized brands such as Kiwibird power bank and QYG power bank and avoid fake products, afterall ,money is second to safe.