This deal has ended.
Today only, JomaDeals has this iCase Rechargeable Battery Case for iPhone 3G and 3GS for $6.99. Plus, use code JOMA2 to take an extra $2 off, dropping it to $4.99. This case doubles your battery life and is made out of rubberized plastic. A free screen protector is also included. Limited quantities are available, so hurry! Shipping is $5 and there is no sales tax (except NY).