Ultralife Polymer® rechargeable batteries combine high-energy chemistry with state-of-the-art polymer technology. Every battery component is solid - there are no liquids that need to be contained by bulky, heavy cell housings. The result is a powerful, safer, thin and lightweight rechargeable battery with a wide operating temperature range and no memory effect. The Ultralife Polymer cell operates at an average voltage of 3.7 V, desirable for single-cell applications like digital cameras and other portable electronics. Cells can be configured in series or parallel to achieve optimum voltage, capacity, and rate capability for specific applications.