http://www.monoprice.com/products/p...=10831&cs_id=1083110&p_id=5480&seq=1&format=2 This battery is great. Will charge the iPhone twice over for $15 (and is obviously rechargeable). Matches the iPhone, looks nice with LED status lights. Lightweight. Great! BUT! I live in a town where I always have five bars of 3G. When I plug my iPhone into this battery I go from 5 bars of 3G to No Service indefinitely. I never even reach 1 bar. But, as soon as I take it out, within ten seconds I have full bars of 3G again. Why is this? Defective battery or what? Reception antenna being blocked?