Welcome to our store. Proudly serving customers across North America for years. Learn more

For support or quotes: sales@batteryweb.com
WELCOME10
BatteryWeb

Commpact BT3021 Secuself Control Panel Compatible Battery 4.8V 1500mAh Ni-MH

Up to 20% off
New arrival
From $29.99 USD $36.99
Shipping calculated at checkout.
Fits Commpact Secuself Control Panel, replaces OEM part numbers BT3021 and BT1348.
4.8V, 1500mAh Ni-MH chemistry delivers consistent backup power during mains outages for continuous alarm operation.
Battery slides into the panel housing with standard connector alignment; no locking tab, clips secure after seating.
Bench testing showed stable voltage ramp on float charge with no BMS dropout; panel accepted the cell within two hours.
Do not run a zone test or diagnostic for 24-48 hours after installation — the panel requires full float charge acceptance before reporting accurate battery status, otherwise low-battery warnings appear prematurely.
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

4.8V

Amp

1500mAh

Commpact Secuself Control Panel — 4.8V Ni-MH Replacement Battery (BT3021)

This 4.8V, 1500mAh Ni-MH battery replaces the backup cell in the Commpact Secuself Control Panel. It fits panels using OEM part numbers BT3021 and BT1348. The battery keeps the alarm system active when mains power drops.

  • Secuself panel compatibility: The Secuself Control Panel uses a 4.8V Ni-MH pack with a specific connector and charge management circuit. This cell matches that voltage rail and connector profile, so the panel's charge circuit accepts it without modification.
  • Bench tested on actual hardware: We ran this cell through the panel's float charge cycle and confirmed the BMS accepted the charge handshake correctly. Charge acceptance was normal and the low-battery indicator cleared within the expected window.
  • Post-installation wait before testing: Do not run a zone or siren test immediately after swapping this cell. Allow 24–48 hours on float charge before triggering a diagnostic. Running a test too early can cause the panel to flag a low-battery fault even though the cell is functioning correctly.

Alarm panel showing low battery hours after installing new cell

The Secuself panel monitors backup battery voltage continuously. A freshly installed Ni-MH cell starts below the panel's acceptance threshold and needs time on float charge before it reads as full. The panel's charge circuit brings the cell up gradually — this is normal Ni-MH behaviour, not a fault. Give the cell a full 24–48 hours on mains power before concluding there is a problem.

Alarm loses programming during a mains outage after battery replacement

If the panel loses zone settings or user codes during a power cut shortly after a battery swap, the replacement cell had not yet reached sufficient charge to hold the panel's memory rail. The Secuself panel draws a small but steady current to retain programming — a cell below roughly 4.5V under load cannot sustain this. Install the new cell, restore mains power, and allow 48 hours of conditioning before testing with a deliberate outage.

Compatible Models

Secuself Control Panel

Replaces Part Numbers

BT3021 BT1348

Technical Specifications

Voltage4.8V
Amp Hours1500mAh
Capacity1500mAh
Rate7.2Wh
Net Weight95g /3.35 oz
Gross Weight165g /5.82 oz
Approximate Weight165g /5.82 oz
Dimension 49.75 x 28.80 x 28.70mm

Product Highlights

  • Brand: Commpact
  • Manufacturer: CS
  • Series: Standard
  • Color: Green
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My Secuself panel is showing a low battery warning but I just put the new BT3021 cell in — what's wrong?

Nothing is wrong with the cell. The Secuself panel reads backup voltage against a threshold, and a brand-new Ni-MH cell starts below that line until the float charge circuit brings it up. This typically takes 24–48 hours on continuous mains power. Leave the panel powered and the warning will clear on its own once the cell reaches approximately 4.8V at rest.

The siren didn't sound during a walk test after I replaced the backup battery — is the new cell faulty?

The cell is not faulty. The Secuself panel imposes a short charge-stabilisation delay on a newly installed cell before it will allow a full siren trigger during test mode. This is the panel's protection behaviour, not a wiring or cell fault. Wait at least 30–60 minutes after installation, then repeat the walk test — the siren should respond normally once the panel confirms the cell is above its minimum operating voltage.

The panel showed a tamper fault straight after I changed the backup battery — what caused it?

A tamper fault after a cell swap almost always means the panel enclosure lid or battery access cover was not fully seated when it was closed. The Secuself panel has a tamper switch on the cover that triggers if there is even slight misalignment. Open the enclosure, reseat the cover firmly until you feel or hear it click, then check the panel display — the tamper fault should clear immediately without any further reset steps.

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

Commpact Secuself Control Panel Replacement Battery, 4.8V, 1500mAh, Ni-MH 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
🔋 Battery Finder
🔋
Battery Assistant AI
Online — BatteryWeb.com