Reliability, portability and cost should be the primary considerations when choosing a wireless phone charger. If you place your phone directly on the surface for charging, portability may not cause concern. On the other hand, if you are looking for an emergency mobile phone charger, it will need to be both reliable and portable.
The pad type mobile phone charger establishes a wireless connection between the phone and the charger, but the device must still be plugged into the power source at home or in the car. Some use a design called inductive charging to charge almost any configured device. New phones that can use such wireless phone chargers will have the features mentioned in their specifications.
Other wireless phone chargers use an adapter that is connected to the phone. You place your phone on a mat or grid that is connected to a charging power source. If you have a more popular or advanced phone, finding the right adapter is fairly straightforward.
Some automakers have announced that they will feature a car as early as the 2012 model year.
In addition to solar and hand crank models, a portable, battery-powered emergency mobile phone charger is also available. This type of wireless phone charger is designed to be stored in a briefcase, wallet or glove box. Unlike charging pads, they are available for different phone models. The battery-powered wireless phone charger is available as a one-time or reusable device.
The hand crank model designed for mobile use is environmentally friendly, but its effectiveness depends on the power and endurance of the phone. Due to their small size, the crank lacks the leverage that is easy to generate electricity. The five-minute work only provides two to five minutes of talk time and does not restore a fully depleted battery.
Another green solution is the solar wireless mobile phone charger. It may or may not contain a battery to store charge, the effectiveness of which depends on the design and the availability of sunlight. Usually this type of charger is larger than other types of chargers, which makes it less portable.
You may also want to consider a hand-cranked radio or lantern with a built-in universal serial bus (USB) connection. These are not dedicated phone chargers, but you can use the same cable that connects your phone to your computer to power your phone. They are mainly sold in areas where storms or other natural events often destroy electricity. Their larger size makes starting easier and gives you more power.