Battery Swap is for U.S. Cellular postpaid customers with active lines and eligible handsets. All swaps must be completed at a participating retail store. No more than four (4) battery swaps will be completed per line per year. (Number of eligible swaps subject to change.) Battery swaps are at the sole discretion of U.S. Cellular and may be denied for any reason, including handset needing repair or limited inventory. Extended use batteries are excluded. Batteries may not be new and U.S. Cellular provides no warranty for any batteries. U.S. Cellular's liability for batteries is limited solely to replace battery. See store or uscellular.com for more details.