A portable electronic device commonly includes one or more batteries. Further, a portable electronic device may be manufactured using one or more overmolding techniques to achieve certain aesthetic and/or mechanical characteristics. Batteries within the portable electronic device may be overmolded by using a covering, wherein the covering includes a protective layer such that the batteries are not exposed to the high temperatures and high pressures associated with an overmolding process which may be in excess of temperature and pressure thresholds associated with the batteries.