Unhappy [Q] Batery drain ... HELP

Hi i install the MiniCm7 2.2.0 nAn, this ROM is awesome, everything works perfectly, and fast, but the battery is draining in a night without wifi and 3g use with step off from 99% to 55% .... (Ondemand, 19mhz-748mhz)
(Sorry for my english, gtranslate )

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