McGrath 3V Lithium Battery - Suits Ultra-Secua Screen Door Lock
This is the exact-fit 3V lithium replacement battery for the McGrath UltraSecua digital security screen door smartlock. The UltraSecua is powered by a single 3V lithium cell rather than the AA batteries used across most McGrath deadbolts, so this is the correct spare to keep on hand for that lock.
This product is a battery only. It does not include the lock, mortice, spindles, or any other components. It is a consumable spare part intended to restore power to an UltraSecua screen door lock that has reached the end of its battery life.
Usually same day if ordered before 11am AEST (excluding weekends and QLD public holidays)
Key Features
- Exact-fit replacement for the McGrath UltraSecua screen door lock - the correct 3V lithium cell for that model.
- Lithium chemistry for a stable discharge curve and long shelf life, suited to the low, intermittent draw of a screen door smartlock.
- Genuine McGrath spare part supplied and supported locally by Terry's.
- Consumable spare - keep one on hand so a flat battery never leaves the screen door lock without power.
Suitable Uses
- Routine battery replacement when a McGrath UltraSecua screen door lock signals a low battery.
- Restoring power after a lockout caused by a flat battery - see the mechanical key override guidance in Additional Information for regaining entry first.
- Holding a spare so a flat cell can be swapped immediately rather than ordered later.
This battery is specific to the UltraSecua screen door lock. It is not the correct spare for the AA-powered McGrath deadbolts.
Related UltraSecua Locks & Spares
Full Specifications
Frequently Asked Questions
It is the correct 3V lithium replacement for the McGrath UltraSecua screen door smartlock, in both the Dual Unlock and Standard versions. It is not the spare for the AA-powered McGrath deadbolts.
UltraSecua locks include a mechanical key override so you can regain entry when the battery is flat. Our mechanical key override guide explains where the keyhole is and how the override works.
Battery life depends on how often the lock is used and on local conditions. Our guide to the realities of electronic door locks covers battery life and coastal conditions, which matter on the Gold Coast.
No. This listing is for the battery only. If you need the lock itself, see the UltraSecua Dual Unlock or Standard models.
Additional Information
The UltraSecua is unusual within the McGrath range in using a single 3V lithium cell rather than AA batteries, so it is worth confirming you are ordering this specific spare rather than an AA pack when your screen door lock signals low battery.
Accessing the battery compartment is straightforward with the correct tool. Many McGrath models use a Torx-headed cover screw - the McGrath Torx screwdriver with magnetic tip is designed for exactly this job and keeps the small cover screw from dropping.
If you are fitting or servicing the UltraSecua on a security screen door, our UltraSecua and triple lock kits guide covers what works and what does not with Austral, Whitco and Lockwood triple lock kits, and the screen door clearance guide is worth reading before fitting any smart lock to a screen door.
12-month warranty against defects in materials and workmanship (24-month on ALBION, ASCOT, WINDSOR, ULTRA SECUA, HAMILTON, BARDON and STAFFORD models). McGrath Locks will repair, replace, or refund at their discretion. Proof of purchase required for all claims. Returns & Warranty | McGrath Locks Warranty
McGrath Locks Warranty
Warranty Summary
How to Make a Claim
- Contact Terry's Tradies Pty Ltd and its associated websites, trading names, and subsidiaries (the place of purchase) within the applicable warranty period.
- Supply your proof of original purchase — a receipt or tax invoice is required.
- Provide a clear description of the fault and your contact details.
- You may be asked to return the product for assessment before a remedy is determined.
- McGrath Locks will, at their discretion, repair the product, replace it with the same or an equivalent model, or provide a refund of the purchase price.
Exclusions
This warranty does not cover:
- Normal wear and tear
- Products that have been disassembled
- Damage caused by improper handling, incorrect installation, misuse, abuse, neglect, modification, or accident
- Installation by unlicensed persons (including non-licensed locksmiths or technicians)
- Products not used in accordance with the supplied instructions
- Cosmetic damage that does not affect functionality
- Labour or installation costs related to the removal or reinstallation of products
- Exposure to conditions outside normal environmental use
- Work completed before warranty approval
- Damage caused by battery leakage, battery failure, or force majeure
Important Notes
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if they fail to be of acceptable quality and the failure does not amount to a major failure. This warranty is provided in addition to your rights and remedies under the Australian Consumer Law.
Further Information
It can be overwhelming with all the choices out there. We can help! We are experts with decades of experience in fitting locks of all types, not just Smart Locks. It is a free service we offer, and with just some photos and a few minutes of your time you can get expert advice and product recommendations tailored precisely to suit your needs.
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