FORGE Replacement Battery for S1 Smart Lock - Spare Part
The FORGE Replacement Battery for S1 Smart Lock (FES1BTR) is FORGE's spare rechargeable battery for the FORGE S1 slimline push pull smart lock.
FORGE's S1 page lists the lock's power supply as a DC 7.4 V rechargeable lithium battery. Keep one spare so the lock is never left without power while the other charges.
Usually ships in 24 hours.
Owned by FORGE Electrical (Australia) · Manufactured in China. Our independent FORGE brand profile sets out how the range compares with the other brands we stock.
This battery is made for the FORGE S1. It is not a standard battery size and does not suit other FORGE locks - check your item code before ordering.
Key Features
- FORGE's replacement battery for the S1 smart lock (item code FES1BTR).
- Rechargeable lithium - the S1 runs on DC 7.4 V, per FORGE's S1 page.
- Lets you keep a charged spare for the S1.
- One of our power accessories for smart locks.
Compatible Locks
FORGE names this battery for the S1 only. If you have another FORGE lock, send us its item code and we will find the right battery.
What's in the Box
- FORGE replacement battery for the S1 x1
FORGE's page lists no other contents. Ask us before ordering if you need to know exactly what is supplied.
FORGE FES1BTR - Specifications
Installation
- Swap the battery in the S1's inside panel when the low-battery prompt appears.
- If the old battery went completely flat, the S1's USB-C emergency port powers the lock so you can open the door first.
- FORGE does not publish the S1's battery-change or charging steps - ask us and we will walk you through it.
Need a hand? Terry's offers installation and service across the Gold Coast.
Frequently Asked Questions
Only if it is the FORGE S1 - FORGE names this battery for the S1.
FORGE's S1 page gives the lock's power supply as a DC 7.4 V rechargeable lithium battery.
FORGE does not list a battery life for the S1 - it depends on how often the door is used and how often the doorbell camera is called.
Power the S1 through its 5 V USB-C emergency port, open the door, then change the battery.
Additional Information
- For the S1 only. Check your lock's item code is FESMTLKS1BA.
- Keep it charged. A spare that sits flat in a drawer will not help when the lock warns you.
- More on batteries. See what really affects battery life and power and battery FAQs.
- Details on request. FORGE gives only the name of this part; we can check the capacity and charging with FORGE for you.
Warranty
2-year FORGE warranty from the date of delivery - covers defects in materials and workmanship under normal use. Excludes improper installation or maintenance, misuse, accident, normal wear and tear (including fading or dulling of finishes) and water damage beyond the product's rated IP protection. Proof of purchase required for all claims. Returns & Warranty | FORGE warranty terms
FORGE Warranty
FORGE Electrical products sold by Terry's Tradies Pty Ltd and its associated websites, trading names, and subsidiaries are covered by FORGE's 2-year warranty against defects. All warranty claims are lodged with us, and we liaise with FORGE on your behalf.
Warranty Summary
How to Make a Claim
- Notify us in writing within the 2-year warranty period, including your proof of purchase and a description of the fault.
- We will assess your claim with FORGE and advise the next steps. The product may need to be returned for assessment.
- Where the defect is covered, FORGE will repair or replace the product or faulty part at no charge.
Exclusions
The FORGE warranty does not cover:
- Improper installation, maintenance or operation, including not following FORGE's product specifications or instructions
- Normal wear and tear
- Misuse, abuse, negligence or accident
- Modification by anyone other than FORGE Electrical
- External causes such as natural disasters
- Damage from excessive rain, water ingress, flooding or other liquid exposure beyond the product's rated IP protection level
- Cosmetic ageing of outdoor finishes - light colour fading, surface dulling or minor oxidation from UV exposure, humidity and temperature changes
IP ratings on FORGE outdoor locks are intended for general outdoor conditions - rain, sun and dust. They do not guarantee performance under extreme exposure such as driving rain, hailstorms, constant salt spray, flooding or immersion.
Important Notes
In unusually harsh or exposed locations, FORGE strongly recommends fitting a rain cover or protective hood over the lock to shield it from direct weather and driving rain. If your product has been exposed to water, contact us for support.
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 the goods fail to be of acceptable quality and the failure does not amount to a major failure.
The FORGE warranty is in addition to these rights.
Confused? Overwhelmed? We get it.
Choosing the right smart lock can be genuinely tricky - door types, backsets, app platforms, compatibility with your existing hardware... there is a lot to consider. We have decades of experience fitting locks of all types, including smart locks, and we are happy to help.
Our expert recommendation service is free. Upload a few photos of your door and describe what you need, and one of our qualified locksmiths will give you a personalised recommendation.
Get Your Free Recommendation →How it works - three easy steps:
1. Upload photos
A few clear shots of your door, lock and frame - inside and out.
2. We assess
Our locksmith reviews your setup and requirements - door type, weather exposure, how you want to use it.
3. You get a recommendation
A personalised recommendation tailored to your door, budget and needs. No pressure, no upsell.
Also useful while you are deciding:

