Help with Wicked artic s3 2W

Whenever I put it on high mode it works a little then shuts off and the 3 leds blink . only way to turn it back on is to power off and back on.
The battery says its fully charged. Could iy be a bad battery or something else?

Is it possible the battery cant handle the draw?

Also what is the best battery to buy for this laser?

Thanks in advance