878643-001 is the HPE spare part number for 96W Megacell Smart Storage Battery with 145mm Cable. This is the number HPE service documentation, iLO event logs, and the label on the failed battery itself will reference, so it is the correct number to match when replacing a depleted or failed Smart Storage Battery. The unit is a 96W Megacell Smart Storage Battery supplied with a 145mm (5.7 inch) power cable, the shorter of the cable lengths used in HPE Gen9 platforms. It is used in DL20, DL60, DL80, DL120, DL160, DL180, DL380, DL388, and DL560 Gen9 servers, and in ML110, ML150, and ML350 Gen9 servers.
HPE Option Part #: 727258-B21
HPE Spare Part #: 750450-001, 815983-001, 878643-001
HPE Model #: 727260-001, 727260-002
PRODUCT SPECIFICATIONS FOR 878643-001:
- Device Type: Battery
- Connectivity Details Length: 5.7 inch (145mm)
- Connectivity Details Type: Power Cable
- Watts: 96W Megacell
- Battery type: Smart Storage
COMPATIBLE WITH:
PROLIANT DL SERIES
PROLIANT ML SERIES
** This list may not be complete. Contact us via Live Chat if you have any questions about compatibility.
FREQUENTLY ASKED QUESTIONS ABOUT 878643-001
What is the difference between 878643-001, 727258-B21 and 750450-001?
They identify the same physical battery. 878643-001, the number on this page, is a spare part number — the number HPE assigns to the replacement unit as it is stocked and shipped for service. 727258-B21 is the option kit, or assembly, part number: the number used when the battery is ordered as a factory or field-installable option. 750450-001 is another spare number for the same unit. This family also includes two OEM drive model numbers and one further spare number, all listed in the cross-reference block on this page. An OEM model number is the manufacturer's own designation for the unit as built.
Will this battery fit my server if the failed unit has a different part number on it?
If the number printed on your failed battery appears in the cross-reference block on this page, it is the same physical product and will fit. HPE issues multiple spare, option, and OEM model numbers for a single unit over its production life. Confirm your server is one of the Gen9 models listed — DL20, DL60, DL80, DL120, DL160, DL180, DL380, DL388, DL560, ML110, ML150, or ML350 — and that the existing battery uses a 145mm cable.
Why does the cable length matter?
This part is the 96W Megacell Smart Storage Battery configured with a 145mm (5.7 inch) power cable. HPE ships the same battery with different cable lengths depending on where the battery mounts relative to the storage controller in a given chassis. If your server was originally fitted with a 145mm cable, order this configuration; a different length may not reach or may not route cleanly in the chassis.
Which servers does 878643-001 support?
The compatible platforms are HPE ProLiant Gen9 rack and tower servers: DL20 Gen9, DL60 Gen9, DL80 Gen9, DL120 Gen9, DL160 Gen9, DL180 Gen9, DL380 Gen9, DL388 Gen9, DL560 Gen9, ML110 Gen9, ML150 Gen9, and ML350 Gen9. Servers outside this list are not covered by the compatibility data for this part number, and cable length and mounting provisions differ between generations.
HPE PARTSURFER INFO FOR 878643-001 (727258-B21)
| Spare PN | Description | |
|---|---|---|
 | 750450-001 | 96W Smart Storage Battery - For DL/ML/SL Generation 9 series of servers - One battery pack provides flash back write cache (FBWC) for all the drive controllers in the server - Connects to the system I/O board, 145mm (5.7-inch) long cable |
| 815983-001 | 96W Smart Storage Battery - For DL/ML/SL Generation 9 series of servers - One battery pack provides flash back write cache (FBWC) for all the drive controllers in the server - Connects to the system I/O board, 145mm (5.7-inch) long cable |
Last Updated: 2026-09-09
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This product is warrantied against hardware failure for a period of 30 Days from the date of purchase. Before making a purchase, please take a moment to review our return policy below.
Returns
It is the customer's responsibility to verify compatibility with their machine(s) before placing an order. If an item is ordered by mistake, it can be returned for refund, minus a 25% restocking fee, within 5 business days of receipt. The cost of freight is not refundable.
Please be aware that factory-sealed equipment can only be returned if it remains unopened.
Defective Products
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In case your hardware becomes defective during the Global One warranty period, but the HPE warranty has expired, you can return the product to us for a working replacement. You are responsible for the shipment of returned merchandise. However, we will cover the expense of Ground /Economy shipment for the replacement item(s).
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