Consistently 60 Hours' Use,
Amazon Verified Purchase(What is this?)
This review is from: Modern-Tech High Capacity Replacement 3500mAh Battery and Rear Cover / Case for Samsung i9000 Galaxy S (Wireless Phone Accessory)
This is really very good. The case fits well, as does the battery (some reviewers have said it's a bit loose, but that hasn't been my experience). I'm getting 60 hours' use where my stock battery was giving 24 after two years. I consider myself a fairly heavy device user, though I don't make many actual phone calls, and I'm well impressed. I couldn't see any reason to change my phone now that its two year contract is up (there doesn't seem to be anything any better in the market as at June 2012), so I'm aiming for another 12 months for the 8 or 9 quid I've paid for the battery.