Premiere dancing flame candle teardown.

This is one of the current generation of surprisingly realistic looking LED candles. It creates the effect of a real flame wavering about by deflecting a scooped flame shaped reflector in front of an LED lightsource.
The Premiere candles seem to have got a reputation for an annoying little thing where the light starts flashing as the batteries start to get too low. This is purely down to the fact that the coil that makes the flame waver draws quite a bit of current and makes the voltage drop to the point the light dips noticeably every time it is pulsed. The answer to this is to use a pair of good quality rechargeable batteries like 2000mAh (or higher) NiMh cells which should last about a week in timer mode. The candle has a choice of continuous operation or a timed mode where it will stay on for 6 hours and then go off for 18 which means it lights automatically at the same time each day.
I'd say this is a first generation candle with this technology, and as such it is actually very good despite the battery issue and a slight noise it makes when the plastic flames taps the side of its collar.
The way the light plays up the moving reflector produces a VERY realistic flame effect in the right surroundings.