Answer to: Battery: test for proper voltage?Volts tested do not give indication of battery quality. (confirmed) I bought a new battery off ebay and found I was experiencing the same low battery symptoms with my iphone that I had with the old battery. I tested the voltage of both batteries after a full charge and got 4volts *and 8.5 to 9 amps*. (*Correction I don't know what I'm talking about in regards to amps. SOrry.*) After taking the phone to the technicians it turns out the batteries were no good. Next time I have my phone apart I'll check the amps on the new battery. Any ideas how many amps a new battery should read?