NEW version - Box of Li-Ion 18650 batteries for Remote Control Transmitter (RC) JUMPER T12

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NEW version Box of Li-Ion 18650 Batteries for Remote Control Transmitter (RC) JUMPER T12, Equipped with Mounting for Two Charging Boards 03962А. This box enables you to securely place and fix inside the case without deformation, two 18650 batteries with a diameter of not more than 18.5 mm, as well as two charging boards. See Photo. I employed a simple scheme of charging the batteries on two modules 03962А. A serial battery circuit is more reliable than a parallel circuit using a step-up voltage Converter because it eliminates interference from the boost Converter and reduces the risk of failure of the Converter during model control. The serial connection provides high reliability of power supply to the transmitter. When the battery charges 03962А significantly heat up, especially when protected with heat-shrink tubing. Using hot melt adhesive for fixing circuit boards is not possible due to heating. Made in the new version of fasteners for boards allows them to securely fix and provide good cooling. See Photo. IMPORTANT: In this connection scheme, batteries must be charged only in series, one by one!!! When connecting the micro USB cable to one charge module, the USB connector of the second module must remain free!!! See Photo. You cannot charge two batteries at the same time, even from two different USB power supplies!!! See Photo. Friends, that's all for now.