| Had experience of this the other day with a mates LightCannon. He reckoned that he might have put the battery in hot after being charged, and the contraction of the airspace made the top DAMN tight. It took two of us about 5 minutes to unscrew it, be holding the body between my knees a tea towel wrapped round the rummer end and both of us trying to unscrew it.
Reckon the oil filter/boa jam lid removers would be best for purchase on the lid..
Lesson learned - don't put the battery in hot.... |