BTI CI03XL-BTI 10.8V 37Wh Li-ion Battery for HP ProBook 640/645/650/655 G2/G3

The BTI CI03XL-BTI 10.8V 37Wh Li-ion Battery is engineered to breathe new life into HP ProBook laptops, specifically the 640, 645, 650, and 655 series across G2 and G3 generations. Designed to meet or exceed OEM specifications, this high-quality replacement battery delivers reliable power, consistent performance, and worry-free operation for daily business tasks, travel, and productivity on the go. With a compact 3-cell, 10.8V configuration and a robust 37Wh energy capacity, it offers a practical balance between slim form factor and long-lasting runtime, helping you stay productive without being tethered to a power outlet. Built to integrate seamlessly with the ProBook lineup, this BTI model supports the same machining tolerances, connector alignment, and protective features that professionals rely on to keep their devices running smoothly through meetings, presentations, and extended work sessions. Whether you’re refreshing an aging battery or stocking up for a fleet, CI03XL-BTI stands out as a dependable, compatible, and cost-effective option that preserves the original laptop’s performance characteristics while reducing downtime.

• Extended runtime for HP ProBook 640/645/650/655 G2/G3 — a 37Wh capacity helps you work longer between charges, supporting typical daily workflows, document editing, web browsing, and lightweight multitasking without frequent recharges.
• Broad OEM compatibility — compatible with multiple OEM numbers and models including 801517-541, CI03048XL-PR, 801554-001, CI03XL, 801554-002, T7B31AA, and covers ProBook 640 G2, 650 G2, 640 G3, 650 G3, 645 G2, 655 G2, 645 G3, and 655 G3.
• Premium Li-ion chemistry — a reliable lithium-ion battery designed for consistent voltage, stable performance, and a long service life in portable computing environments.
• Safety and reliability — built with protective features to guard against overcharge, overdischarge, short circuits, and thermal fluctuations, helping protect both the battery and the laptop.
• Easy installation and plug‑and‑play interoperability — engineered to align with the ProBook chassis and battery bay, enabling quick replacement without specialized tools or motherboard modifications.

Technical Details of BTI CI03XL-BTI 10.8V 37Wh Li-ion Battery

• Battery type: Lithium-ion (Li-ion) rechargeable
• Voltage: 10.8V
• Capacity: 37Wh (approximately 3.4Ah)
• Configuration: 3-cell (3S) pack
• OEM compatibility numbers: 801517-541, CI03048XL-PR, 801554-001, CI03XL, 801554-002, T7B31AA
• Compatible models: PROBOOK 640 G2, 650 G2, 640 G3, 650 G3, 645 G2, 655 G2, 645 G3, 655 G3
• Chemistry: Lithium-ion (Li-ion) rechargeable
• Model identifiers: CI03XL, CI03XL-BTI, CI03048XL-PR, 801517-541, 801554-001, 801554-002, T7B31AA
• Energy density: 37Wh nominal energy capacity for extended portable use

How to install BTI CI03XL-BTI 10.8V 37Wh Li-ion Battery

• Power down the laptop completely and unplug the AC adapter. Remove any connected peripherals and save your work.
• Place the notebook on a clean, flat surface with the bottom panel facing up. If your ProBook uses a removable back cover, release the screws or latches that secure the panel and carefully lift it away.
• Locate the existing battery, typically secured by a pair of latches. Open the latches to release the old battery from the bay connection.
• Gently disconnect the battery cable from the motherboard or battery connector. Avoid pulling on the wires; disconnect by handling the plug or connector.
• Remove the old battery from the bay and align the BTI CI03XL-BTI battery with the bay guides. Ensure the contacts line up with the motherboard connection.
• Firmly seat the new battery and re-engage the battery latches to lock it in place. Reconnect the battery cable to the motherboard, ensuring a secure and snug fit.
• Replace the back cover panel and screws. Reattach any cables or components you may have moved, then power on the laptop and connect the charger to begin charging the new battery. Run a full charge-discharge cycle to calibrate the battery for optimal performance.

Frequently asked questions

• Q: Is this BTI battery compatible with HP ProBook 640 G2 and other listed models?
  A: Yes. The CI03XL-BTI 10.8V 37Wh battery is designed for compatibility with PROBOOK 640 G2, 650 G2, 640 G3, 650 G3, 645 G2, 655 G2, 645 G3, and 655 G3, and corresponds to OEM numbers such as 801517-541, CI03048XL-PR, 801554-001, 801554-002, and T7B31AA.
• Q: What are the key specifications of this battery?
  A: It is a 10.8V Li-ion battery with 37Wh capacity, arranged as a 3-cell pack. It is intended to replace OEM batteries for the specified ProBook models.
• Q: How long will the battery last between charges?
  A: Runtime depends on usage, screen brightness, and workload. The 37Wh rating provides extended uptime relative to smaller-capacity replacements, but exact hours vary by task and power settings.
• Q: How should I dispose of an old battery?
  A: Recycle the old battery according to local regulations or return it to a certified e-waste facility. Do not puncture, crush, or incinerate Li-ion cells.
• Q: Is installation difficult for non-technical users?
  A: Replacement follows standard disassembly and reassembly steps for most HP ProBook models. With basic screwdrivers and careful handling, most users can complete the swap in 15–30 minutes.
• Q: Does this battery affect warranty?
  A: Replacement batteries that are consumer-installed and used in accordance with manufacturer instructions typically do not void the main device warranty. Check your device’s warranty terms for specifics.