Tenergy Alkaline AA batteries- 4 pcs card (Gamer version) - Specially designed by award-winning designer Alberto Lam Tenergy alkaline batteries deliver outstanding performance and reliability. Some major advantages of Tenergy Alkaline batteries includesDependable and long lasting power. Tenergy batteries operate reliably in temperatures of -4 to 129 degrees Fahrenheit. Batteries are date coded to guarantee freshness.