Replacement for TM777: Drop-In Alternatives We Stock
Looking for a replacement for the TM777 (TM777 - Dell 55 Whr 6-Cell Li-Ion Battery)? Pro Disk Network ships Dell 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 TM777
| SKU | TM777 |
|---|---|
| Product | TM777 - Dell 55 Whr 6-Cell Li-Ion Battery |
| Current price | $212.66 |
| Stock status | In Stock |
| Detail page | View TM777 › |
Drop-in replacements for TM777
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.
312-1324-02 - Dell 60 Whr 6-Cell Lithium-Ion Primary Battery for Dell Latitude E6530/ E6520/ E6430/ E6420/ E5530/ E5520 Laptops
SKU: 312-1324-02
Price: $148.21
312-1325-02 - Dell 97 Whr 9-Cell Lithium-Ion Primary Battery for Latitude E5430/ E5530/ E6430/ E6520/ E6530 Laptops
SKU: 312-1325-02
Price: $152.36
T555C - Dell 85 WHR 9-CELL LITHIUM-ION PRIMARY Battery for STUDIO XPS 13 1340 Laptop
SKU: T555C
Price: $154.13
0T555C - Dell 85 WHR 9-CELL LITHIUM-ION PRIMARY Battery for STUDIO XPS 13 1340 Laptop
SKU: 0T555C
Price: $154.13
312-1324 - Dell 6-Cell 60-WHr Lithium-Ion Battery for Latitude E6530 E6520 E6430 E6420 E5530 E5520 Laptops
SKU: 312-1324
Price: $168.57
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.