Brand: Westinghouse. MPN: IFR18500-1KBP4. Lithium-Iron Phosphate Batteries are perfect fit for outdoor solar powered equipment. The battery offers a longer life cycle, and its wide operating temperature range provides an outstanding performance in efficiency and sustaining energy while charged by solar powered devices.
Features
High recharge cycles life of more than 1000 times. 
Wide operating temperature range : The battery is capable of operation in a wide temperature range  from -10oC to +60oC. 
Excellent safety: The batteries passed all safety test of crushing, altitude simulation, short circuit, impact, nail picking and over discharge test without leak, explosion or fire. 
Specifications
Chemistry: Lithium Iron Phosphate
Voltage: 3.2
Capacity: 1000mAh
Size: 18500 (same height as AA but thicker in diameter)
Packaging Dimensions: 4.25" x 4.63" x 0.75" ( W x H x D)
Packaging Weight: 0.28 LBS
UPC: 889554008003