Replacement for PB991A: Drop-In Alternatives We Stock
Looking for a replacement for the PB991A (PB991A - HP 6-Cell Lithium-Ion 10.8VDC 5100mAh 58Wh Primary Notebook Battery for Business Notebooks nc4200 nc4400 tc4200 and tc4400 Series)? Pro Disk Network ships HP drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the PB991A
| SKU | PB991A |
|---|---|
| Product | PB991A - HP 6-Cell Lithium-Ion 10.8VDC 5100mAh 58Wh Primary Notebook Battery for Business Notebooks nc4200 nc4400 tc4200 and tc4400 Series |
| Current price | $223.43 |
| Stock status | In Stock |
| Detail page | View PB991A › |
Drop-in replacements for PB991A
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
PB991AR - HP 6-Cell Lithium-Ion 10.8VDC 5100mAh 58Wh Primary Notebook Battery for Business Notebooks nc4200 nc4400 tc4200 and tc4400 Series
SKU: PB991AR
Price: $210.53
501114-001 - HP 8-Cell Lithium-Ion (Li-Ion) 14.4V 2.55Ah 73Wh Primary Notebook Battery for HP EliteBook 8530p/8530w Series Notebooks
SKU: 501114-001
Price: $155.55
490306-001 - HP 8-Cell Lithium-Ion (Li-Ion) 14.4V 4400mAh Primary Notebook Battery for HP EliteBook 6700s/6800s Series Notebooks
SKU: 490306-001
Price: $218.58
KU532AA - HP 8-Cell Lithium-Ion (Li-Ion) 14.4V 4400mAh Primary Notebook Battery for HP EliteBook 6700s/6800s Series Notebooks
SKU: KU532AA
Price: $219.07
408545-142 - HP 6-Cell Lithium-Ion 10.8VDC 4400MAh 55Wh Primary Notebook Battery for NC6000/NC6500 Series Notebooks
SKU: 408545-142
Price: $90.47
408545-222 - HP 6-Cell Lithium-Ion 10.8VDC 4400MAh 55Wh Primary Notebook Battery for NC6000/NC6500 Series Notebooks
SKU: 408545-222
Price: $160.80
EH767AA - HP 6-Cell Lithium-Ion 10.8VDC 4800MAh 58Wh Primary Notebook Battery for NC2400 Series Notebooks
SKU: EH767AA
Price: $176.43
408545-141 - HP 6-Cell Lithium-Ion 10.8VDC 4400MAh 55Wh Primary Notebook Battery for NC6000/NC6500 Series Notebooks
SKU: 408545-141
Price: $177.38
408545-251 - HP 6-Cell Lithium-Ion 10.8VDC 4400MAh 55Wh Primary Notebook Battery for NC6000/NC6500 Series Notebooks
SKU: 408545-251
Price: $191.04
404887-241 - HP 6-Cell Lithium-Ion 10.8VDC 4800MAh 58Wh Primary Notebook Battery for NC2400 Series Notebooks
SKU: 404887-241
Price: $195.91
412780-001 - HP 6-Cell Lithium-Ion 10.8VDC 4800MAh 58Wh Primary Notebook Battery for NC2400 Series Notebooks
SKU: 412780-001
Price: $198.74
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.