... .4mmWeight215gPackage SizeInside box:15*7.5*10cm carton:39.2*32.5*22.5cmG.W(20PCS)/carton6.4kg1. Display ... , three squares means 3/4 capacity, two means 1/2 capacity, one means 1/4 capacity, one square blink ... again and the battery capacity only can light for about one hour).2. Type of protection: EXib II BT4 (Zone 1 ... and 2)3. Type of Certificate: MA, EX, CE/ATEX, DME4 ...