Mugen, Seidio or other battery?

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http://forums.androidcentral.com – Hello all, My seidio 3800 battery its not keeping it's charge as well anymore. So its time for another extended battery. Bother offer 3800 or 3900 mah. Some reviews say that Mugen is better. Any advice from the AC community? 1 year and counting till I am eligible for a discounted rate for an upgrade. (HowTos)