How to get through the electric gate on batman arkham PS3?

Can anyone tell me how to get through the electric gate on the batman arkham game. I got through the gate where you throw the batarang through the electric field then hit the power box. Now I need to get through the electric gate. Does anyone know how to do it? Thanks in advance for any help.How to get through the electric gate on batman arkham PS3?
here's the guide:



http://www.ign.com/wikis/batman-arkham-c鈥?/a>

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