Plug 9V battery’s DC connector with MB-102 Breadboard power supply. Plug mobile phone’s USB to micro USB cable to MB-102 Breadboard power supply’s USB port. Optionally, change jumper of MB-102 Breadboard power supply to 5V at least at one side. Plug mobile phone’s USB to micro USB cable to mobile phone’s charging port. Set the multimeter to DC voltage with the 20V range. Connect the red lead to the “VΩmA” port and the black lead to the “COM” port. Touch the black probe to the battery’s negative terminal and the red probe to the positive terminal. A new battery should give you a ~9V reading. For used batteries, this value should be 7.5V-8.5V. How to make a 9v battery pack rechargeable at home using 18650 cells in series to replace the 9 volt alkaline battery at home. Subscribe. Description. This Mod Adds Two New Battery Types Rechargeable 9V Battery and Long Life Rechargeable 9V Battery as well as a new Battery Charger. class names. RechargeableBattery9V. LongLifeRechargeableBattery9V. R9V_battery_charger. you can find a Types file in the mods folder Thanks to @Captain Bigzy for making this for me. Connecting the USB to DC Converter to the USB Cable. Take the USB to DC converter and locate the USB port on it. Insert one end of the USB cable into the USB port of the converter. Connect the other end of the USB cable to a USB port on your computer, laptop, or any other power source that provides Let it dry before moving forward. Take the new 9V battery and align it with the battery compartment, ensuring the polarity matches the markings inside the compartment. Insert the battery firmly but gently, making sure it fits securely. If the smoke alarm has a cover, carefully place it back over the battery compartment and secure it in place. How to Make USB Rechargeable 9V Li-Ion Battery ?? (Easy)In this video, I will show you how to make a 9-volt rechargeable battery and use it anywhere and save If the discharged battery voltage is above 1.29 V/cell start with a C/10 charge. Option: if the discharged battery voltage is above 1.0 Volts/cell, discharge the battery to 1.0 V/cell then proceed to rapid charge. Rapid charge at 1 C until the temperature reaches 45 degrees C, or the dT/dt indicates full charge. 1 Answer. An ideal capacitor will instantly charge up to whatever voltage you connect it to.A practical capacitor will take some time to charge up owing to a finite internal resistance (referred to as equivalent series resistance or ESR),but eventually, it will still reach the source voltage.A practical capacitor also has a maximum voltage The recommended charging rate of an Li-Ion Cell is between 0.5C and 1C; the full charge period is approximately TWO TO THREE hours. In "1C", "C" refers to the AH or the mAH value of the battery, meaning if the Li-ion cell is rated at 2600mAH then the "C" value becomes 2600, or 2.6 Amps, which implies that it can be charged at its full 1C, or at SmcLw.