Er, actually those are Patriot missile canisters, four per launcher vehicle, six vehicles per battery (etym. c.1525 OF battre + erie, lit. an organisation or place where beating takes place- I don't know why either). The Americans are claiming Mr Tappin attempted to sell batteries for Hawk surface-to-air missiles (or missals as the Yanks say) to Iran. The sort of battery that one puts in a car or a torch.
Something like this - although Mr Obama, I'm not suggesting that the Iranians try putting this inside the Hawk missiles the Americans sold them, and this one isn't advertised as suitable for putting in a missile and probably wouldn't work as it's nowhere near expensive enough for defence use: