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727258-B21: HPE 96W Smart Storage Battery with 145mm Cable for DL/ML/SL Gen9 Servers

HPE 727258-B21 Batterie
HPEBatteries

Also listed as: 815983-001, 754706-001, 727260-001, 727260-002 · made by Panasonic

The HPE 727258-B21 is a 96-watt centralized Smart Storage lithium-ion battery kit designed for HPE ProLiant Gen9 servers. It provides emergency backup power for flash-backed write cache (FBWC) modules on HPE Smart Array P-Series controllers, enabling write cache acceleration while safeguarding data against unexpected server power loss.

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Specifications

Part number727258-B21
BrandHPE
Made byPanasonic
TypeBatteries
Other numbers815983-001, 754706-001, 727260-001, 727260-002
Statusend of sale
TypeLithium-ion rechargeable battery pack
Capacity96W (supports up to 16 devices / controllers)
Cable length145mm integrated wire harness
Generation fitHPE ProLiant Gen9 rack, tower, and Apollo servers

About the 727258-B21

727258-B21 is the standard 96-watt centralized Smart Storage lithium-ion battery kit with 145mm connection cable for HPE ProLiant Gen9 servers. Engineered to support up to 16 devices simultaneously, it provides hold-up power during unexpected power failure, enabling Smart Array P440ar and P440 controllers to flush volatile DRAM cache contents to flash memory.

Compatibility

Compatible with all HPE ProLiant Gen9 servers equipped with P-Series Smart Array controllers, including DL380 Gen9, DL360 Gen9, DL160 Gen9, DL180 Gen9, DL120 Gen9, DL60 Gen9, DL80 Gen9, DL560 Gen9, DL580 Gen9, ML350 Gen9, ML110 Gen9, ML150 Gen9, and Apollo 4200 Gen9.

How to identify a genuine unit

Enclosed black rectangular plastic housing measuring 138mm x 32mm with a multi-wire 145mm harness and 10-pin keyed header connector. White label states option part number 727258-B21, spare part number 815983-001 or 754706-001, and assembly part number 727260-001.

Buying used

Inspect battery pack casing carefully for any signs of swelling, bulging, or seam separation. Connect to a test server and verify in iLO 4 under Power -> Smart Storage Battery that the status registers as 'OK' and that full charge capacity is achieved without degraded cell warnings.

Reference prices (last 12 months, updated 2026-10-27)

Used: USD 20 (1 sighting, Oct 2026)

All sightings
SellerConditionPriceNoteSeen
ebay.comusedUSD 20Tested 100% health HPE 96W Gen9 Smart Storage Battery with cable2026-10-27

Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.

Fits these models

Check compatibility with HPE

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that HPE has tested with the HPE 727258-B21.

Equivalent part numbers

FAQ

What happens if the 96W battery fails in a Gen9 server?

The Smart Array controller automatically disables write caching and drops to write-through mode, protecting data but reducing storage write performance until replaced.

How long does a Gen9 Smart Storage battery take to charge?

A fully depleted battery reaches operational charge state within 2 to 3 hours of continuous server operation.

Buying or selling 727258-B21?

New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.

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