Huawei 02350FHW | Battery Backup Module BBU Storage

The Huawei 02350FHW, internally modeled as the STLZ03PWRB, is a hot-swappable Battery Backup Unit (BBU) engineered for Huawei OceanStor data storage systems. It supplies temporary backup power to a storage controller enclosure, giving the array enough runtime to safely flush cached, in-flight data to disk during an unexpected power event — a critical safeguard against data loss in production storage environments.

This rechargeable battery module delivers a maximum output voltage of 120V DC and is designed as a drop-in field-replaceable unit (FRU), so it can be swapped without taking the storage system offline. It's commonly paired with Huawei Dorado18000 V3 and OceanStor 18800F V3/V5 and 6800 V5 storage platforms, in addition to the broader OceanStor server family.

Frequently Asked Questions

What is the Huawei 02350FHW used for?
It's a Battery Backup Unit (BBU) that protects cached data on Huawei OceanStor storage controllers during a power failure, letting the system write that data to disk before shutting down.

Is the 02350FHW the same as the STLZ03PWRB?
Yes — STLZ03PWRB is Huawei's internal model number for the 02350FHW part.

Is this BBU hot-swappable?
Yes, it can be replaced without powering down the storage controller enclosure.

What storage systems is it compatible with?
Huawei OceanStor data storage servers, including OceanStor and Dorado controller enclosures that use the STLZ03PWRB battery module.