Spec. - Product Type:lipo battery pack - Capacity: 4000mAh - Voltage: 22.2V - Max Continuous Discharge: 60C (240A) - Max Burst Discharge: 120C (480A) - Weight:: 698g - Dimensions: 135.5 * 42.5 * 55mm (L * W * H) - Balance Plug: JST-XH - Discharge Plug: - Charge Rate: 1-3C Recommended, 5C Max - EC5 Connectors installed from factory Gens ace lipo 4000mah 6s1p 60C/120C battery Suited to the following models: 600 size helicopter. Such as Align Trex 500.600, Gaui, Align Trex 550E. 1. Matched strictly by the lowest internal resistance/ capacity/ and voltage for maximum power and cycle life. 2. Standard JST/XH Balance Plug 3. Easily monitor the condition of the battery 4. Provide greater speed and longer runtimes 5. 5C fast charge capable 6. Gens ace lipo pack are always advertised with its actual C ratings Gens ace is dedicated to the design and manufacture of Lipo packs, Nimh battery, Life packs. We set our warehouse in Germany to bring you the products in shortest time with an unbeatable combination of price and performance. Our low internal resistance and high cycle life ensure that you are getting maximum value from your battery. All our airplane & heli Lipo battery use ORACOVER shrink which quality is known throughout the world. Some of our flight batteries use aluminium plate with both sides so that release the heat more quickly and also protect the battery when it drops. While our C ratings may be 20-90% lower than other brands, you'll find that Gens ace battery pack will regularly outperform other brand' higher rated batteries. Gens ace lipo pack are always advertised with its actual C ratings - compare our internal resistance values with their competitors and you'll see the difference. Our unique construction method would maximize full performance potential of Gens ace battery.