Replacement for 42T4520: Drop-In Alternatives We Stock
Looking for a replacement for the 42T4520 (42T4520 - IBM Lenovo 3-Cell Bay Battery 50 for ThinkPad X300 Series)? Pro Disk Network ships IBM 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 42T4520
| SKU | 42T4520 |
|---|---|
| Product | 42T4520 - IBM Lenovo 3-Cell Bay Battery 50 for ThinkPad X300 Series |
| Current price | $278.39 |
| Stock status | In Stock |
| Detail page | View 42T4520 › |
Drop-in replacements for 42T4520
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.
92P1087 - IBM Lenovo 10.8V 4400mAh 6-Cell Li-Ion Battery (Sanyo) for ThinkPad R50 T40 T41 T42 Series R50 T40 T41 T42 Series
SKU: 92P1087
Price: $131.43
08K8193 - IBM Lenovo 10.8V 4400mAh 6-Cell Li-Ion Battery (Sanyo) for ThinkPad R50 T40 T41 T42 Series
SKU: 08K8193
Price: $109.16
92P1091 - IBM Lenovo 10.8V 4400mAh 6-Cell Li-Ion Battery for ThinkPad R50 T40 T41 T42 Series
SKU: 92P1091
Price: $132.92
08K8195 - IBM Lenovo 10.8V 4400mAh 6-Cell Li-Ion Battery (Sanyo) for ThinkPad R50 T40 T41 T42 Series
SKU: 08K8195
Price: $133.97
08K8199 - IBM Lenovo 6-Cell 10.8V 4400mAh Li-Ion Battery for ThinkPad R50 T40 T41 T42 Series
SKU: 08K8199
Price: $148.72
08K8197 - IBM Lenovo 9-Cell Li-Ion Hi-Capacity Battery for ThinkPad R50 T40 T41 T42 Series
SKU: 08K8197
Price: $154.75
92P1058 - IBM Lenovo 10.8V 4400mAh 6-Cell Li-Ion Battery for ThinkPad R50 T40 T41 T42 Series
SKU: 92P1058
Price: $157.89
92P1075 - IBM Lenovo 10.8V 4400mAh 6-Cell Li-Ion Battery for ThinkPad R50 T40 T41 T42 Series
SKU: 92P1075
Price: $157.89
92P1064 - IBM Lenovo 10.8V 4400mAh 6-Cell Li-Ion Battery for ThinkPad R50 T40 T41 T42 Series
SKU: 92P1064
Price: $157.89
92P1070 - IBM Lenovo 6-Cell 10.8V 4400mAh Li-Ion Battery for ThinkPad R50 T40 T41 T42 Series
SKU: 92P1070
Price: $157.89
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.