Hi. I know that this thread may not correspond to this forum, but I hope some users know about this subject. What kind of light batteries I can use for Phytec KitCON-161 eval board(supply voltage: 8-12V / 500mA). First of all I used 12V from PC. I tryed a 9V Zinc Chloride battery but the eval board can't run with it. Could it run with an unrechargeable battery? Thanks. Damian
"Phytec KitCON-161 eval board(supply voltage: 8-12V / 500mA) ... tryed a 9V Zinc Chloride battery but the eval board can't run with it."
You need to understand that "9V" alone is not an adequate description of a battery! As well as the voltage, the battery has to be able to supply the current requirement of the board.
If you're using a "9V" battery like this: www.gpbatteries.co.uk/.../img_greencell_9v.jpg It is quite likely that it can't deliver 500mA!
If the board really does require 500mA, you will need a set of (at least) AA size alkaline batteries. A 12V lead-acid battery might be more suitable?
Search for "Sealed Lead-Acid" (SLA) or "Valve-Regulated Lead-Acid" (VRLA); eg,
www.camdenelec.com/.../product-subcategory.asp
www.yuasa-battery.co.uk/.../np.html
Note that a 12V lead-acid battery normally gives more than 12V, depending on current charge state.
8 NiCD or NiMH cells should be suitable for the task. They have less inner resistance than alkaline batteries.