Lumen Tactical LLC

1. Unscrew the tail cap and remove the battery from the light. Take a look inside the battery chamber and the positive end of the battery. The factory often...

Remove the part about AA batteries if the light is an MT1C/2C Pro.  For testing purposes, you can use regular Alkaline AA batteries so we can rule out a...

This usually applies to a new DOA product. 1. Remove the tail cap and inspect the threads on the body tube and inside the tail cap. There should only be...

Issue: You recently purchased a Nitecore NB20000 Gen3 power bank and want to charge two devices simultaneously. However, when you plug one device int...

How to charge O'Pen Glow? Connect the charging base to the power supply, and insert the pen directly into the charging base to charge while the refi...

ISSUE: IMR Batteries "end" charge prematurely - See T# 1768861 for CASE Study 1. Remove all batteries from the charger 2. Use a dry clean ...

Issue: The power indicators on the light turn green while charging, but they remain red when the light is removed from the charger. r. Check if the l...

Issue: NB10000G3 makes Hissing/Buzzing/Sizzling noises when charging another electronic device. Explanation : Internal After consulting with the fac...

What is the minimum charging current? The NB Air's minimum charging current is 50mA. If the device reduces the current below this threshold, the NB Air...

The humming sound you're noticing is known as inductor whine or coil whine, which is a common phenomenon in many electronic devices that use high-freque...