Battery life of the smartphones is the nightmare behind the scened.The performance is directly reported to battery power so you may find that an external battery for your smartphone is a must.
So now we give you some useful tips when choosing an buying an external battery:
What to avoid:
1. Batteries with integrated connector fixed in the casing.
Any pressure on the battery is directly transferred in the main phone connector. Under these circumstances it would not be a good idea to keep it in your pocket so what about battery portability?
2. Detachable external battery case
It ruins the phone’s appearance, makes it heavier and you will need to take it off anyway every time you connect it to a PC/Mac via USB.
3. Reduced power reserve : anything under 2200 mAh is not worth the while.
What characteristics are to be followed?
1. Capacity: you have to reach a compromise between capacity and size.
Assess your needs correctly and realistically.
See below how to calculate the number of complete/full charges according to the capacity of the external battery.
In any case do not choose something that doesn’t charge your phone completely at least once.
2.Connectors: external phone batteries that just have a USB port exit are old news, and outdated.
You do not want to have a cable and a battery in your pocket, so choose a model which is compatible with iPhone or with Micro-USB (Samsung, HTC, etc. which operates on Android, BlackBerry, Nokia Lumia) or one that has both connectors incorporated.
For Tablets things are a bit different for compatibility reasons and also because you cannot carry the Tablet in your pocket, it is better that it has a USB port exit, preferably two so you can charge your phone simultaneously if you wish/need to.
3. Size : Do not choose a model with great capacity but that you cannot take with you. It’s all about mobility, so think of the best compromise.
4. Design : it may not matter as much technically speaking but it is best that you choose a pleasant design, in a colour that you like, etc.
How to estimate the number of charges:
This calculation cannot be exact and varies from situation to situation, from battery to battery. It also depends on the “wear” of your phone’s battery, on the circuits used by the developer, etc.
However, for an estimate, use this formula: deduct from the external battery capacity. The power will be used in the charging process. What is left should be divided to the battery capacity of your phone. The result represents a quite accurate estimation of the number of