I HAVE A LUMINOX 3100 I THINK IT LOOSES TIME IS THIS A SIMPLE FIX?

If any battery operated watch starts losing time or displaying the incorrect time, this is usually indicative of a battery going bad and needing replacement. My Luminox 3100 started lagging in time and I noticed that the second hand would intermittently stop. I also have a Suunto Vector (Digital) wrist-top computer and the times along with the compass, altimeter, light and alarms all started to act crazy and all it happened to be was the battery being run down. Coincidentally the Suunto has a battery gage that only appears and flashes during low battery charge.
BL: Try the simplest thing first, change your battery. Please be very careful not to break the O-ring on any watch that's waterproof/resistant as this will render the protection useless. Also if your watch is still under a manufacturer or vendor's additional warranty, get them to change it as not to void your warranty. 'Hope this helps!