How Can I use Battery for Power in mini6410 borad

Hi,please help me to know how can i using my mini6410 board without adaptor
and by battery ?

If you use a Microchip MCP73781 this will do the battery charging and also
use a DS2745 to monitor the charging via I2C.

This is a nice IC as it automatically switches the supply from battery to
charging input and at the same time charges the battery.

You then need to build a buck/boost power supply that can take the battery
voltage and generate 5.0V output from around 2.7 to 4.2 input. Check out
the TP63020 from Texas for a suitable switching supply IC. 

Depends on your Mini6410 and what size LCD you are using but I would make
sure the supply is at least 1.5A output.

This can be charged from USB or from a wall power supply with 5V output.

Dave...