They are made with premium Lithium Ion cells and are rated as shown in the specifications. Look at all of the details below and make sure that the model of your product and also the battery number are shown in the information below. What's the average life of a Lithium Ion or Lithium Polymer battery? Usually it is around 400 cycles for Lithium Ion and usually this is the same for Lithium Polymer. Slightly different is Nimh, It should last for around 500 cycles. (cycling a battery means to discharge and recharge.) Its not a common known fact that a cycle will still be used, even if only partially discharged then recharged. Its good practice to run the battery low and recharge when the battery reaches about 10% of its charge left. This will extend the life of the battery and maintain its capacity for charge. ISO 9001 certification means that strict manufacturing standards are adhered to. Please make sure that you carefully check that your product is shown below in the products table. With over twenty thousand different batteries its difficult to keep our records as up to date. if the capacity of our battery is not the same as your original. The Mah is a figure which shows the capacity of the battery to store charge and will not affect the original equipment or charging. More Mah means longer runtime, less Mah means slightly less runtime.