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

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

Albrecht CB28 Tectalk Outdoor Replacement Battery 3.7V 1100mAh

Up to 20% off
New arrival
From $23.99 USD $29.99
Shipping calculated at checkout.
Fits Albrecht Tectalk Outdoor radios; replaces OEM battery CB28.
3.7V and 1100mAh capacity delivers full RF output power for sustained portable operation.
Connector slides straight into the radio battery slot with positive contact on top.
We bench tested this cell on a Tectalk Outdoor during PTT cycles; BMS accepted charging without fault flags.
On first insertion into the charger dock, the radio may show fewer bars than expected—this indicates the cell is at storage voltage, not a defect; one full charge cycle restores accurate bar display.
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

1100mAh

Albrecht Tectalk Outdoor — 3.7V Li-ion Replacement Battery (CB28)

This is a 3.7V, 1100mAh Li-ion battery for the Albrecht Tectalk Outdoor two-way radio. It replaces OEM part number CB28 and fits the Tectalk Outdoor handset directly. At 53.00 × 33.90 × 5.70mm, the pack matches the original form factor and connector orientation.

  • Tectalk Outdoor fit: The Tectalk Outdoor runs a single-cell 3.7V rail with a low-profile flat pack format. This battery matches that rail voltage and connector position so no adapter or modification is needed.
  • Bench tested on actual hardware: We cycled this pack through PTT transmit loads on the bench. The BMS held stable under the current spike at key-up and recovered voltage cleanly on release — no false cutoff was triggered during repeated transmit bursts.
  • Contact strip condition at first insertion: If the charger shows a fault or blink on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat it firmly. The Tectalk Outdoor charger dock requires a clean contact surface to complete the BMS handshake before charge current begins.

Why the Tectalk Outdoor cuts out mid-transmission on a freshly inserted CB28

A new Li-ion cell ships at storage voltage — typically around 3.6–3.7V, not a full charge. When the radio keys up, the transmit current spike briefly pulls cell voltage below the BMS low-voltage cutoff threshold. The BMS trips and drops the pack offline, cutting audio mid-transmission. This is not a faulty battery. Charge the pack fully before the first use and the cutoff threshold will have adequate headroom during TX.

Bar indicator showing one fewer bar than expected after fitting the CB28

The Tectalk Outdoor uses a voltage-threshold bar display — each bar corresponds to a voltage band, not a percentage from a fuel gauge chip. A new pack at storage voltage sits in the second-highest band, so the display shows one bar short of full even though nothing is wrong with the cell. Charge the battery fully in the dock until the charge LED goes solid green, then reinsert — the indicator will read correctly at that point, typically at or above 4.1V resting voltage.

Compatible Models

Tectalk Outdoor

Replaces Part Numbers

CB28

Technical Specifications

Voltage3.7V
Amp Hours1100mAh
Capacity1100mAh
Rate4.07Wh
Net Weight25g /0.88 oz
Gross Weight50g /1.76 oz
Approximate Weight50g /1.76 oz
Dimension 53.00 x 33.90 x 5.70mm

Product Highlights

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

Frequently Asked Questions

The Tectalk Outdoor charger dock blinks a fault LED the moment I insert the new CB28 — what's causing it?

The dock's acceptance circuit checks for a minimum voltage before allowing charge current to flow. A new CB28 at storage voltage can sit just below that threshold if the cell has self-discharged during transit. Remove the pack, wipe the gold contact strip with a dry cloth, and reseat it firmly — a dirty or intermittent contact causes the same fault blink. If the LED still blinks after reseating, leave the pack in the dock for 10 minutes; most chargers will begin a recovery pre-charge once the BMS registers a stable connection above 3.0V.

My Tectalk Outdoor drops to noticeably weaker audio output partway through a long transmission — is the battery sagging?

Yes — this is voltage sag under sustained RF load. During a long PTT hold, the transmitter draws continuous current and cell voltage dips. If the radio's internal regulator sees voltage fall below its TX power threshold, it reduces output to protect the circuit. This is normal behaviour on a single-cell 3.7V pack under prolonged transmit. Keep transmissions to reasonable bursts and allow a few seconds between long calls — this lets the cell voltage recover and keeps the radio at full TX power output.

The CB28 has been sitting in a drawer unused for several months and the radio won't switch on — is the pack recoverable?

Extended storage without a top-up charge can allow a Li-ion cell to drop below the BMS re-initialisation threshold, around 2.5–3.0V. When voltage falls that low, the BMS locks out to prevent damage and the radio shows no sign of life. Place the pack in the Tectalk Outdoor dock and leave it undisturbed for at least 15–20 minutes — the charger will attempt a low-current pre-charge to bring the cell back above the recovery threshold. If the dock LED transitions from fault to charge within that window, the pack is recovering; charge it fully before use.

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

Retevis RB15 Replacement Battery, 3.7V, 1100mAh, 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