I purchased this battery for a Nokia 6230, it holds a charge the same as the original battery included with the phone. The battery was purchased directly from Amazon, not through a marketplace seller. While Amazon's price is higher than the marketplace sellers, it is still about 15 less than R.Shack. Amazon's battery is genuine, I was able to confim authenticity at the Nokia web site, where I entered the 20 digit scratch off number located on the front of the battery.