As one of its daily deals, All4Cellular offers this Stitchway 1900mAh Backup Battery 3-Pack for Apple iPhone / iPod, model no. CHEX-ALL-BK-08-319, for $9.99 with free shipping ($3.33/battery). That's $2 under our mention from last week and the lowest total price we could find for this quantity elsewhere by $2. It's compatible with the iPhone 4/4S and 4th generation iPod touch, as well as other models. Deal ends today.