TechFuel Battery for Panasonic Toughbook CF-52, CF-51, CF-29 Laptops Replaces CF-VZSU29 - Professional 9-cell 7800mAh 87Wh Li-ion Laptop Battery High performance, extended capacity, 9-cell Li-ion spare battery pack produces 10.8V (volts) and 7800mAh/87Wh of power storage capacity TechFuel batteries have advanced circuit board technology including thermal circuit protection for safety, stability, and performance; grade-A cells are used in all TechFuel battery packs for faster charging and more efficient power consumption with up to 500 charge cycles over the life of the battery TechFuel laptop batteries are designed and manufactured for a precise fit in the Panasonic Toughbook CF-29 and CF-52 series laptops ; CE, FCC and RoHS certifications ensure quality, safety and peace-of-mind TechFuel lithium-ion batteries are built to reliably power your laptop; operating time will vary depending upon computer settings and hardware use; generally 1 hour of operation for 2000mAh of capacity Customer support is included in your purchase; if you need help with your new replacement battery, our US-based, knowledgeable staff are ready to assist; your purchase comes with a no-hassel 30-day money back guarantee and a 1-year full replacement warranty