Hisewen LI11B001F Replacement Battery for Onyx Studio

Hisewen replacement LI11B001F is a drop-in 3500mAh Li-ion battery designed to restore long playtime to Harman Kardon Onyx Studio 1, 2, 3 and 4 portable Bluetooth speakers.

If your Onyx Studio speaker no longer holds a charge or shuts off unexpectedly, replacing the internal battery is often the simplest way to bring it back to reliable use. This Hisewen unit matches the LI11B001F specification used in multiple Onyx Studio generations and ships with an installation screwdriver so you can swap batteries at home without specialized tools.

How much extra playtime will this 3500mAh battery provide?

The 3.7V 3500mAh capacity gives substantially longer runtime compared with worn-down factory cells, depending on volume and audio content. Expect several extra hours of continuous playback under moderate listening levels; heavier bass and maximum volume will reduce run-time.

• Capacity: 3500mAh at 3.7V for extended use
• Typical real-world increase: multiple hours over degraded batteries
• Actual duration varies with volume, streaming source, and age of speaker

Will this battery fit my Harman Kardon Onyx Studio model?

This Hisewen battery is manufactured to be compatible with Onyx Studio 1, 2, 3 and 4 models that use the LI11B001F cell format. Confirm your original battery label or speaker model before purchasing to ensure compatibility.

• Compatible models: Onyx Studio 1 / 2 / 3 / 4
• Replacement model number: LI11B001F—match to your old battery
• Physical size: 2.68 x 0.67 inches — check fit inside your speaker chassis

How safe and reliable is the Hisewen replacement battery?

Hisewen batteries include built-in safety protections to guard against overcharge, over-discharge, short circuit, overcurrent, and overheating. Each cell is tested for quality before shipment, and the package includes a small screwdriver to simplify installation and reduce the risk of damage during replacement.

• Integrated safety: protections for charging and discharge events
• Durable construction to maintain stable performance over time
• Includes installation tool kit for safer, easier replacement

How hard is it to replace the battery myself?

Replacing the battery is straightforward for anyone comfortable with small electronics. The included screwdriver lets you open the speaker housing and unplug the old battery; follow online guides or the speaker’s service instructions to avoid damaging clips or wiring.

• Included: 1 x LI11B001F replacement battery, 1 x screwdriver tool
• Procedure: power down, remove rear cover screws, disconnect old battery, install new unit
• Tip: keep track of screws and test power before reassembling fully

Who is this for? The Hisewen replacement battery is geared to Onyx Studio owners who want to avoid expensive repairs or replacement speakers. It’s ideal for DIYers, audio enthusiasts restoring older speakers, and anyone seeking an affordable way to recover original playback time. Always verify model compatibility and follow safety guidance during installation to get the best lifespan and performance from your speaker.