Synergy Digital Cordless Phone Battery, Works with Snom 2758 Cordless Phone, (Li-Ion, 3.7V, 900 mAh) Ultra High Capacity, Compatible with Grandstream 1595 Battery - Walmart.com
Universal Power Group UB670 6V 7Ah Lawn and Garden Replacement Battery: BatteryClerk.com Lawn and Garden
Saft 410946 Model 2758 Battery Assembly - NiCad Battery