STARNOVO 250mAh 3.7V Replacement Battery for Sennheiser OfficeRunner, DW Office, DW Pro1, DW Pro2, DW Pro2 ML, DW Office ML, SD Office, SD Office ML, SD Pro1, SD Pro1 ML, SD Pro2, SD Pro2 ML, MB Pro series

Type	Li-ion Polymer battery
Voltage	3.7V
Capacity	250mAh
Dimensions	4.5 x 18 x 36.0mm
Compatibility	Sennheiser OfficeRunner, DW Office, DW Pro1, DW Pro2, DW Pro2 ML, DW Office ML, SD Office, SD Office ML, SD Pro1, SD Pro1 ML, SD Pro2, SD Pro2 ML, MB Pro series

$12.99 USD

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STARNOVO keeps this battery in continuous production, delivering the same specifications, built-in protection circuit, and documented compliance with every unit.

Why This Battery Works

Full-round runtime — Delivers reliable power through a full round without cutting out early.
Drop-in fit — Built to the original battery dimensions for straightforward installation with no modification required.
Built-in protection — Guards against overcharging, over-discharging, overcurrent, and short circuits.
Certified safe — Complies with UN 38.3, UL 2054, and IEC 62133 safety and transport standards.
12-month warranty — Factory-backed warranty for consistent quality and dependable after-sales support.

Compatibility Help

Not sure whether this is the correct battery? Send us a photo of your original battery, connector, or device label, and we'll confirm compatibility within 24 hours.

Wholesale & Standing Inventory

Ask us about standing inventory, volume orders, and bulk pricing. Contact us directly at sales@starnovo.com for a quick quote.

Battery Replacement Guide

Planning to replace your battery? Read the guide for your device before starting.

Is this battery compatible with my device?

Yes. This replacement battery is compatible with Sennheiser OfficeRunner, DW Office, DW Pro1, DW Pro2, DW Pro2 ML, DW Office ML, SD Office, SD Office ML, SD Pro1, SD Pro1 ML, SD Pro2, SD Pro2 ML, MB Pro series. Please confirm your original battery model matches the listing before ordering. If unsure, message us with your device model and battery part number — we'll verify within 24 hours.

How do I install this battery?

Installation requires a small screwdriver and a plastic pry tool. We recommend watching a teardown guide for your specific device before starting — check out our step-by-step replacement guide. If you're not comfortable with DIY repair, please seek professional service.

Does this battery come with installation tools?

No. Tools are not included. You'll need a small screwdriver and a pry tool, available at any electronics retailer or online marketplace.

Is this battery safe?

Yes. Each battery includes a built-in PCM (Protection Circuit Module) against overcharge, over-discharge, over-current, and short circuit. It is certified under UL, IEC62133, and UN38.3 standards, and passes strict QC testing on voltage, capacity, and protection.

What is the cycle life?

Typically 300–500 cycles, depending on usage and charging habits. To maximize lifespan, avoid discharging below 10% and charging above 45°C / 113°F.

My battery arrived but doesn't power on. What should I do?

First, ensure the connector is fully seated and charge the device for at least 30 minutes. If still no power, try reseating the connection. If the issue persists, contact us for troubleshooting or replacement.

What is your return/warranty policy?

We offer a 30-day DOA guarantee and a 12-month warranty from delivery date. If the battery fails to hold charge, swells, or has physical defects, contact us with your order number and description for a replacement or refund. Damage from improper installation or abuse is not covered.

What if my device model isn't listed or doesn't fit?

If your device model, voltage, or dimensions don't match our standard batteries, we can build a custom battery pack to your specs. Contact us at sales@starnovo.com with your device model, original battery photo, and requirements. Our team will provide a quote within 1–2 business days.

Do you ship internationally?

Yes, we ship worldwide. Standard delivery takes 10–20 business days depending on destination. Tracking is provided once shipped.