When you receive your battery pack, please test it for a low voltage condition BEFORE you charge or discharge the battery. There is NO warranty for any lithium polymer battery once you have charged or discharged it. No warranty is expressed or implied in respect to the capacity, life cycles, storage, or discharge characteristics of lithium polymer batteries. Use of radio control airplanes and everything associated with them has the potential for serious injury to persons and damage to property. In purchasing and using these products, the user agrees to accept responsibility for all such risks, and not to hold the manufacturer, distributor, retailers, and respective employees and owners responsible for any accident, injury to persons, or damage to property. Use of the products we sell means that you accept these terms and you are fully responsible for any consequences.