9.95$ plus shipping which it will calculate for you!! 7.2v perfect for use with the EZ-B!! Smart Charger
NanoBots
USA
Asked
— Edited
Iphone Sensor Stream Server
— Receive iPhone Sensor Stream data in ARC, map accelerometer, gyro and compass to variables for EZ-Script control and visualization.
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Back Order...
I know
It had been good for a while then I saw it was back ordered today 
any one have any new links on 7.2v batteries, i found one with a charger on ebay for 22.00
5800mAh