Purchased an extra one of these for my Olympus TG-4. I shot 700 pictures and video on one charge at the beach. Outstanding.

You can also use the LI-90B for the TG-3. It will fit, if you are upgrading from the TG-1 or TG-2, that battery which is the LI-90b will fit in the new Olympus Tough TG-3. The Li-ion LI 92B 3.7volt compact battery will normally last up to a 4 hour charge........

So far good

Wasn't sure how long this battery lasts, since the camera can take long time lapse movies, decided to get a 2nd battery so i can either continue or if i'm on travel and took a lot of normal movies.