Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com
WELCOME5
BatteryWeb

Nokia HS-21W Replacement Battery 3.7V 150mAh LP402025L150

Up to 21% off
New arrival
From $22.99 USD $28.99
Shipping calculated at checkout.
Fits Nokia HS-21W headset; replaces OEM battery LP402025L150.
3.7V, 150mAh Li-Polymer cell delivers sufficient capacity for talk and standby cycles on this DECT unit.
Connector slides into the battery bay with a single locking tab; polarity is marked on the housing.
We bench-tested the cell in HS-21W charging cradle; BMS accepted the new pack within one full cycle.
Charge the headset in the base station for one complete cycle before taking calls — DECT headsets require the base to log the new battery before talk-time estimates are accurate.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
WECARE5

Please Confirm Delivery Timeline

Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
4.8
★★★★★
★★★★★
Average Customer Rating
By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe
✦

Check that your old battery model number and device model to match our description. This makes sure they work together.

✦

We ship your order same day if you buy it before 4 PM EST.

Warranty

Let customers speak for us

from 11 reviews

Product is exactly as described and arrived quickly

Robert Jones
Rocket ES4-12 Compatible Replacement Battery

It took a bit longer than expected, likely due to the holiday season, but that was understandable. So far, the battery seems to be working well!

Linda M.
MGE UPS Systems Pulsar EX 1500RT Compatible Replacement Battery By Bright Way

Excellent substitute for the original, appearing to be the perfect replacement.

Alberto J.
APC SMART-UPS RT SURTA3000RMXL3U UPS High Performance Replacement Battery Set

It was what i was looking for. Support is fast

Jaswal
WAHEGURUG - RADHASWAMI

Fast service

Mark Casias
BatteryWeb

Perfect fit

Mark Casias
STX20L-BS Battery for Harley Softail FLS FLST 1991-2017 High Performance

Works Perfectly!!

Ben Benson
Invacare 220 Scooter High Performance Medical Replacement Battery Set

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3.7V

Amp

150mAh

Nokia HS-21W — 3.7V Li-Polymer Replacement Battery (LP402025L150)

This is a 3.7V, 150mAh Li-Polymer cell for the Nokia HS-21W Bluetooth wireless headset. It replaces the OEM pack (LP402025L150) when the original loses capacity or fails to hold charge. The cell measures 26.50 × 20.00 × 4.10mm and fits the HS-21W housing without modification.

  • HS-21W platform fit: The HS-21W runs a single-cell Li-Polymer pack at 3.7V nominal. The LP402025L150 format is specific to this headset's internal cavity and connector orientation — the voltage rail and physical footprint must match exactly for the BMS to accept the cell and enable charging through the base station.
  • Bench tested on actual hardware: We cycled this cell through the HS-21W base station and confirmed the BMS completed its handshake, accepted charge current, and released into discharge without fault flags. Voltage at full charge measured 4.18V — within the expected Li-Polymer ceiling.
  • Base station logging on first install: Place the HS-21W in the base station immediately after fitting the new cell and leave it for a complete charge cycle before making a call. The base needs to log the new cell before its talk-time estimate becomes accurate — skipping this step causes the base to display misleading charge status.

Why the HS-21W cuts out mid-call on a new battery

The HS-21W draws current from two loads simultaneously — the audio codec and the Bluetooth radio. Under combined draw, a cell at storage voltage can sag below the BMS cutoff threshold, triggering a shutdown that looks like a call drop. This is not a fault with the replacement cell. A full conditioning cycle through the base station raises the resting voltage high enough that the combined load no longer pulls it below cutoff. If dropouts continue after three full cycles, check the base station contacts for oxidation.

Base station shows full charge but headset cuts off after a few minutes

A new Li-Polymer cell ships at storage voltage — typically around 3.7V — not at full charge. If the base station's charge indicator trips on that resting voltage before completing a real charge cycle, it can report "full" prematurely. The headset then cuts off quickly because the cell was never topped up to 4.2V. Place the headset in the base, leave it undisturbed for at least two hours, then check that the indicator cycles through charging before settling on full.

Compatible Models

HS-21W

Replaces Part Numbers

LP402025L150

Technical Specifications

Voltage3.7V
Amp Hours150mAh
Capacity150mAh
Rate0.56Wh
Net Weight4g /0.14 oz
Gross Weight29g /1.02 oz
Approximate Weight29g /1.02 oz
Dimension 26.50 x 20.00 x 4.10mm

Product Highlights

  • Brand: Nokia
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My HS-21W keeps dropping the call about halfway through — why does this happen with a brand-new battery?

The Bluetooth radio and audio codec in the HS-21W draw current at the same time, and a new cell at storage voltage can sag below the BMS cutoff under that combined load. The BMS interprets the sag as a depleted cell and shuts down — it reads as a call drop. Run three full charge-discharge cycles through the base station and the resting voltage will stabilise high enough to handle the combined draw without tripping cutoff.

The base station isn't recognising the new pack — the charging light doesn't come on at all.

The HS-21W base station needs the BMS in the new cell to complete a handshake before it enables charge current. If the cell shipped below the BMS's minimum recovery threshold, the base sees no valid pack and stays dark. Seat the headset firmly in the cradle, wait 10 minutes, then remove and reseat it — this prompts a fresh handshake attempt. If the light still doesn't activate, check that the headset contacts are clean and making full contact with the base pins.

Talk time seems much shorter in the first few days — is the replacement cell faulty?

Li-Polymer cells need three to five full charge-discharge cycles before they reach rated capacity — this is normal cell behaviour, not a defect. On the first cycle the HS-21W base may also log an inaccurate talk-time estimate because it hasn't yet profiled the new cell's discharge curve. Run the headset through three complete cycles — full charge in base, use until the headset shuts off, return to base — and talk time should increase noticeably with each cycle.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bancontact
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Related Products

Nokia HS-21W Replacement Battery, 3.7V, 150mAh, Li-Polymer 1

Engineered for Performance. Built to Last.

Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.

Our Collections