Magic Charger: Can the 5th battery charge the phone?

According to Battery.com.cn, for people who can't do without electronic products, the lack of power is a devastating problem, but don't worry now, because the development of USB-U charger has solved the problem for the majority of users. Insufficient problems.

What is a USB-U charger?

The USB-U is a portable, pocket-sized portable charger that charges the appliance via a USB cable with just 3 AA batteries. Based on the LT1308BDC/DC converter design, the USB-U is capable of charging a mobile phone/MP3 player or other USB device with a full 1 amp current instead of the standard 500 mA.

working principle

The three AA batteries power the USB-U charger and use the DC/DC boost converter LT1308 to convert the voltage to 5V. Although the two batteries can work, they can only support for a short time. Inside the charger, a small magnetic field is created, which converts the magnetic energy into electrical energy according to the principle of electromagnetic induction, stores it in a snubber capacitor , and then recreates the magnetic field.

Which devices can I charge?

The internal circuitry of the USB interface is the same as the 5W Apple charger, which can be used by Apple devices. In the future, the test will support more USB devices.

How many 3 AA batteries can be charged?

Take the iPhone 5 as an example - when the battery capacity is 1440 mAh, the battery voltage is 3.7V. When the normal AA battery power is about 1500 mAh, 100% of the AA batteries are used for power supply, and the iPhone 5 can be charged once. Taking into account the heat, running and other losses, 3 AA batteries can basically meet the needs of the iPhone5.

How is it different from other USB chargers?

1, easy to assemble. All components of the USB-U charger are equipped with perforations, the components are very convenient, and the puzzle is full of fun. This DIY electrical device is especially suitable for geeks or hands-on control.

2. Only AA batteries are required. After the battery is dead, just open the cover and replace it with a new one. Lithium battery chargers can only be "dry".

3. Higher charging current. Charging with 1A current, charging time is half of other chargers, quickly filling the electronics with electricity.

4, comes with LED lights. The USB interface is also especially useful with LED lights, which can be used as a flash for users to use in dark environments.

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