iphone 4 battery specs? 3.7 or 4.2 volts?

[campas12]

So i purchased a replacement battery via ebay- and just noticed the specs state 1420MAh 4.2V. I started looking around more and i believe the original battery is 3.7V.

so
1. should i have purchased the 3.7V?

2. will using this 4.2V cause any issues?

 

[chambone]

3.7 volts is a nominal figure. At full charge it'll be at 4.2 volts and when almost fully discharged about 3.5-3.6 volts. So no, it will not cause any issues. Although it's a little strange that they sell it as a 4.2V battery.

If you want to be really sure you could check the voltage with a multimeter. They probably ship it half charged and it should be under 4 volts.