The 1200mAh 11.1V 25C Li-Po battery Tamiya Stick is a top-quality LiPo pack made by Titan Power, an American company. These packs, also known as Liti-LiPolimer packs, are the newer and improved version of lithium-ion packs. One of their main advantages is their high capacity-to-size ratio, making them ideal for virtually any AEG replica. These packs also have no memory effect and can be frequently charged without being discharged first. However, it is important to not discharge the pack below 3V per cell or overcharge above 4.2V per cell. Additionally, LiPo packs have a low self-discharge rate of about 3-5% per month when not in use. It is important to monitor the pack as prolonged storage can lead to irreversible damage. For best results, an unused LiPo pack should be charged to about 70%. These packs have a lifespan of 500-700 cycles