I posted my question but looks like the question was deleted. Again I bought a new Cf VV 1600 MAH and the battery will work when voltage is set above 3v. The battery just shuts down and will do nothing. To reset battery I plug back into charger and then works for a few seconds then same thing happens. I just bought this today from ebay and the security code is good. Would like to have help from Aspire instead of paying for shipping to return and may have the same problem. Using the nautilus tank system. Please advise!