TechFuel Battery for HP ProBook 4530s 4540s 4440S 4545s 4535s 4430s Series Replaces 633805-001 63373-321 HSTNN-LB2R PR06 - New Professional Performance Li-ion Laptop Battery (6-Cell 48Wh) Replacement Battery for HP Laptop Models: ProBook 4330s | ProBook 4331s | ProBook 4341s | ProBook 4430s | ProBook 4431s | ProBook 4435s | Probook 4436s | ProBook 4440s | ProBook 4441s | ProBook 4446s | ProBook 4530s | ProBook 4535s | ProBook 4540s | ProBook 4545s | ProBook 4740s Batteries. 48Wh 4400mAh 10.8V Li-ion battery pack for your HP laptop is CE and RoHS certified for optimal quality, efficiency and safe performance. Replaces HP Part Numbers:  3ICR19/66-2 | 633733-1A1 | 633733-321 | 633805-001 | 650938-001 | HSTNN-DB2R | HSTNN-IB2R | HSTNN-LB2R | HSTNN-OB2R | HSTNN-XB2E | HSTNN-XB2F | HSTNN-XB2G | HSTNN-XB2H | HSTNN-XB2I | HSTNN-XB2N | HSTNN-XB2O | HSTNN-XB2R | HSTNN-XB2T | HSTNN-XB3C | LC32BA122 | PR06 | QK646AA | QK646UT Constructed with advanced circuit board technology, including thermal circuit protection for safety and stability; Grade-A cells for faster charging and efficient power consumption. Precision fit construction; CE and RoHS certification ensures quality, safety and peace-of-mind. Up to 500 charge cycles. Friendly and knowledgeable Customer Support Staff available by email or toll-free telephone. No risk 30-day money back guarantee; 1-year full replacement warranty. Built with quality components and rigorous quality control. Operating time will vary depending upon computer settings, hardware use, etc. Generally, for every 2000mAh, the battery will yield approximately 1 hour of run time.