Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Description: _x005f_x000D_ Suitable for bulbs: T6/U2/L2 _x005f_x000D_ Suitable for batteries: 1*18650/26650 _x005f_x000D_ 2 well-connected 18650/26650 _x005f_x000D_ Charging interface: USB charger (for Android) _x005f_x000D_ Battery indicator: low power lights up red light _x005f_x000D_ full power lights up green light _x005f_x000D_ Output voltage 3.7V _x005f_x000D_ Output current: 1.8A _x005f_x000D_ Product diameter 26mm _x005f_x000D_ Dimensions: 27.00x27.00x5.00mm/1.06x1.06x0.2inch _x005f_x000D_ Material: mixed material _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ 1. The circuit board does not support 2 or more 3.7V lithium batteries in series, the circuit board will burn out; _x005f_x000D_ 2. The circuit board cannot be connected to low-current bulbs such as Q5\R5, the bulb will burn out; _x005f_x000D_ 3. The new circuit board does not come with welding wires and springs. If welding is required, please contact customer service. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1*Micro USB Charge Circuit Driver Board 1.Versatile Battery Compatibility: Tailored to power XML-T6/L2/U2 bulbs, this micro USB charge circuit driver board is compatible with either one or two parallel 3.7V 18650 or 26650 lithium batteries, accommodating an input voltage range of 3.0-4.2V. 2.Optimal Current Output: The LED flashlight driver board reliably delivers an output current ranging from 900 to 1800MA, ensuring your devices are powered efficiently and effectively for optimal performance. 3.Advanced Dimming Technology: Featuring imported C1C dimming capabilities, this USB charging driver board offers three adjustable light modes-high, low, and strobe-along with a seamless dimming option to suit various lighting needs and preferences. 4.Built-In Safety Features: With an integrated over-temperature protection and reverse battery protection design, the flashlight L2 / U2 bulb power supply board prevents damage to both itself and connected components, ensuring safe operation even if the lithium batteries are installed incorrectly. 5.Gold-Plated Durability: The USB charging switch power circuit board's gold-plated design not only enhances conductivity but also provides a robust build with a 25mm diameter and 1mm protruding grooves on each side for secure mounting and longevity.