Venom Racing's 7.2 3000mah NiMH Battery Pack is built using the latest Quad Welding technology for superior strength and optimum power. Comes pre-fitted with a standard Tamiya® type connector. Do Not dead short the cells after discharging or store them with a resistor across the pack. They do not need this and it will hurt the battery pack. Store cells with voltage in them. Use a digital voltmeter if your charger does not have one, to monitor the voltage. As soon as the voltage stops rising, the pack is charged. Do not let voltage drop like you would with NiCd cells. Charger MUST be able to adjust the negative peak charge rate. Heat or Overcharging Will Deteriorate or Damage NiMH Cells.