I agree with ncw2k69 I use WiMoSpeed to and it's way better than msm7kcpuspeed my battery life drain is the same which it should be because the only way overclocking will drain your battery is if you increased the voltage of the CPU.if you really want to overclock x1 try WiMoSpeed. For me it works at 672mhz
Very simple to use and the battery life is still the same for me
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