Winnerplusa Battery for iPhone 4 not Compatible with iPhone 4s

This battery is only for iphone 4 phone , not compatible with iphone 4s, please read it carefully.don't buy wrong item,100% new Li-Ion battery Cell type: Lithium Ion Voltage:3.7V Capacity:1420mAh The battery operation time depends on conditions such as:Transmitting power level,Signal (distance between the phone and the base station), Network parameters defined by the operator .100% Brand New & Excellent quality 2. Capacity: 1420mAh 3. Power: 3.7V --- 5Whr 4. Cell Type: Li-ion Polymer Battery 5. Compatible with iPhone 4 4G