Nothing wrong we provide a charger that can be used in an emergency to charge thecamera, HP (mobile phone), Blackberry, iphone, smartphone, Android, etc., especially if you travel a lot away from a power source, for example you are a mountain climber, etc.
Currently there are many power banks with various power sizes, and the price is also more affordable, but the problem power bank requires a power source when it is used up.
If you are in a place where there is no power source for a long time then it is useless that it's called a power bank.
Well for the solution we can provide a charger that uses a source of batteries are sold for example AA size batteries, so we can bring from home or buy from stalls while on the go.
Currently there are many power banks with various power sizes, and the price is also more affordable, but the problem power bank requires a power source when it is used up.
If you are in a place where there is no power source for a long time then it is useless that it's called a power bank.
Well for the solution we can provide a charger that uses a source of batteries are sold for example AA size batteries, so we can bring from home or buy from stalls while on the go.
The photo above is a charger that is used for Blackberry, using only 1 AA size batteries.
To be able to charge like the photo above I use DC to DC Converter 0.9-5V .
This converter is widely sold on the internet, in electronic component stores may be there too but rarely.
I bought from Aliexpress.com with the detail address:
http://www.aliexpress.com/item/Free-Shipping-DC-DC-0-9V-5V-600mA-Boost-Converter-Step-Up-Module-in-stock-high/842784020.html
It costs about $ 1 USD
Here is a picture of the appearance of the module:
Two cables are connected to the battery terminals (positive and negative), the USB socket is connected to the device to be charged .
The input voltage range is 0.9V up to 5V, the output is 5V.
For the module I bought it when using 1 AA size battery current is 200mA, if using 2 AA size batteries can generate 600mA, obtained from the specification description.
I tried to use 1 smallest battery (AAA size), the result can still be used to mencharging Blackberry.
If you are interested please googling or directly to the above link above address.
