So around 6 months ago, I bought a Seidio 3500 mhz extension battery for my Droid Eris. All was fine and dandy until recently. Currently, my extension battery is not lasting any longer than the standard battery. Both batteries are lasting less than 6 hours currently. My phone has already gotten below 30% two times today (between 7 am - 7 pm) and it shows no signs of improvement. When I look at battery use, it shows that my cell standby is using 44% of the battery and that my time without signal is 59%. I know this is impossible because through my own use, I'm never unable to send texts or make calls. My phone always shows that it has signal. I've tried all the battery improving tricks and nothing has really made an impact. I'm living on a college campus, where wifi is present everywhere I go (and only taking up 11% of my battery), so turning off data really can't help much. I'm running xtrROM 4.6.5 and I'm underclocking at 19Mhz. If anyone can help me out, I would greatly appreciate it.