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

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

Harman Kardon TC30 Remote Replacement Battery 3.7V 950mAh

Up to 21% off
New arrival
From $23.99 USD $29.99
Shipping calculated at checkout.
Fits Harman Kardon TC30 remote control; replaces OEM lithium-ion cell.
3.7V, 950mAh capacity delivers consistent IR LED output for full-range wireless control.
Single-cell design installs vertically into the TC30 battery slot with flat contact orientation.
Bench test confirmed stable BMS voltage hold under sustained IR trigger cycles without cutoff.
On first install, verify positive terminal contacts the spring — reversed polarity is the primary cause of remote not responding after battery swap.
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

950mAh

Harman Kardon TC30 — 3.7V Li-ion Replacement Battery

This is a 3.7V, 950mAh lithium-ion battery for the Harman Kardon TC30 remote control. It replaces a depleted or failed original cell and restores full wireless control of Harman Kardon audio equipment. Dimensions are 53.07 × 33.08 × 7.78mm — confirm these match your existing cell before ordering.

  • TC30 remote compatibility: The TC30 uses a single-cell 3.7V lithium-ion pack. This replacement matches that voltage rail exactly, ensuring the IR LED circuit receives the correct drive current for consistent signal transmission.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench. The protection circuit handled over-discharge cutoff cleanly, and IR output held steady across the full usable voltage range.
  • Single-cell swap note: When fitting this cell, check polarity against the markings in the battery compartment before closing the remote. A reversed install produces no response — not a dead battery, just a backwards one.

Why the TC30 remote stops working immediately after a new battery install

The most common cause is polarity reversal. Lithium-ion cells have a positive terminal and a negative terminal — swap them and the remote draws zero power. The remote shows no response at all, which makes it look like a dead battery rather than a fit error. Open the compartment, check the markings, and reseat the cell with the correct orientation. The remote should respond immediately once the terminals are aligned correctly.

TC30 remote requiring you to point closer and closer to the unit

The IR LED in the TC30 remote needs a minimum supply voltage to fire with enough power to reach the receiver across a room. As the battery discharges toward its lower threshold — around 3.0V — IR output drops and effective range shrinks. This isn't a fault with the remote itself; it's the cell losing capacity. Replacing the battery restores full IR drive current and normal operating distance.

Compatible Models

TC30

Technical Specifications

Voltage3.7V
Amp Hours950mAh
Capacity950mAh
Rate3.52Wh
Net Weight27g /0.95 oz
Gross Weight52g /1.83 oz
Approximate Weight52g /1.83 oz
Dimension 53.07 x 33.08 x 7.78mm

Product Highlights

  • Brand: Harman Kardon
  • Manufacturer: CS
  • Series: Standard
  • Color: White Grey
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

I just put in a new battery and the TC30 remote still doesn't work — what am I missing?

Check polarity first. Lithium-ion cells are easy to seat backwards, and a reversed install looks identical to a dead battery — the remote simply does nothing. Open the compartment, match the positive and negative terminals to the markings printed inside, and reseat the cell. The remote should respond immediately once the orientation is correct.

My TC30 remote works but I have to hold it right up to the unit — why?

The IR LED needs a minimum voltage to produce enough signal strength to cross a room. When the battery drops toward 3.0V, IR output falls below that threshold and effective range shrinks to almost nothing. The remote isn't faulty — the cell is near end of life. Fit a fresh 3.7V 950mAh cell and normal range returns.

The new battery in my TC30 remote seems to drain much faster than the original — what causes that?

A stuck or jammed button keeps the remote in a constant transmit state, drawing current continuously even when you're not using it. Press each button on the TC30 to confirm none are physically depressed or wedged. If all buttons release cleanly and drain continues, check that the battery compartment cover closes flush — a partial close can create contact pressure that keeps a button triggered.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • 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

Harman Kardon TC30 Replacement Battery, 3.7V, 950mAh, Li-ion 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