Use this smart battery charger MCP73871-3CCI/ML charge controller from Microchip Technology to monitor the state of your batteries. Its output produces a current of 50 to 1000 mA. With an output that has a voltage of 4.35 V, this is power management at its best. In order to ensure parts aren"t damaged by bulk packaging, this product comes in tube packaging to add a little more protection by storing the loose parts in an outer tube. This device runs on Li-Ion|Li-Pol. This device has a minimum operating supply voltage of 4.65 V and a maximum of 6 V. This battery gauge has an operating temperature range of -40 °C to 85 °C.