Always check that both the model of your device and battery number match your original battery. Usually your new battery should be expected to have a life span of between 400 and 500 cycles. A cycle means one discharge and one recharge. Different battery chemistries can be charged and discharged a different amount of times. The amount of charges does depend on the battery use. You are guaranteed a very high quality replacement battery with ISO 9001 certifications when you purchases a battery from us. The batteries here are designed to be as reliable and as safe as the original manufactured battery. Cameron Sino actually manufacture batteries for many original equipment companies. The only difference is that a different label that is installed. This Cameron Sino product is designed to be used in place of the batteries that are shown in the specs information below.