There can be a host of reasons why your light is not charging. Here are some techniques to help you troubleshoot.
1. Try a different power source. If you always charge through your computer/laptop try using a 2 amp wall socket charger to confirm that it is the light and not a USB port issue. A computer's USB port is usually only active when the computer is opened up and many times don't provide proper amperage. There are also many knock-off wall adapters that either don't provide enough current or break after a short period of time.
Urban light charge indicators are known to blink green and red if the current is not sufficient. The light will also simultaneously enter Travel Lock-out mode if the light is plugged into an outlet or computer with amperage below .5amps.
Taz lights can actually tell you what amperage your computer or outlet is giving you. Holding the secondary button while the light is plugged in will indicate the rate at which the Taz is charging:
Red: <0.5 Amp
Amber: 0.5-1 Amp
Green: >1 Amp
2. Try a different cable. Our charge cables are a standard Micro-USB attachment so if you have any hanging around try those. The cable could be damaged in some way so why not give another cable a chance!
3. External batteries. The Smart External Battery Charger is the only current charger for all Seca and Imjin [Stella] products. This replaced the Multi-Chemical Charger from past generations of lights. First step is to try a different wall outlet or power strip. Check to see if there are any wires pulling loose from the base of the plug. Red or white wire sheaths where the cord is connected to the plug will be exposed (time to replace the charger). If you also have other batteries or chargers from previous Light & Motion purchases, try different combinations to nail down whether you have a battery or charger issue.
The green light on the charger, indicating a full charge on either the Smart External Battery Charger or the Multi-Chemical Charger will illuminate within the first 10 minutes if the battery has expired. This usually happens after a battery has been kept in storage for years, or has reached its end-of-life around 3-5 years of consistent use.