Samsung SPH-A840, PM-A840 Lithium Battery released for Sprint PCS phone:

This is a lithium-ion, standard capacity battery for Samsung A840 or PM-A840 Sprint cell phone, makes a great replacement or backup battery. 

• Battery color: Black
• Battery capacity: 1050 mAh
• Battery voltage: 3.7v
• 7 days digital standby & 3.5 hrs of talk time
• Retail blister packaging
• Compatibility: Samsung A840, Samsung SPH-A840, Samsung PM-A840

Great buy, affordable yet meets all OEM specifications!!!