I used this battery to power a small low power consumption of astronomy unit. if at the very beginning (buy 16.11.14) she held several hours now a small half hour. after a response from the seller (fast) saying that it is normal that it is a small battery (Oo) I decide to change the battery myself and SURPRISE Yet 17Ah battery stamp is only half a battery that is the rest of reconstituted stone to make it has a big battery. wholesale battery once opened is a small battery 7-10Ah remain filled with stone. the manufacturer, the distributor and the retailer are they concient? which ment on the battery capacity?