Sealake FM12140 Replacement Battery 12V 18Ah NB AGM Battery
🔋 18Ah Battery Replaces 14Ah Perfectly
Our 18Ah battery is a direct replacement for your 14Ah model – it matches in size, fits without modification, and works with your existing charger. The higher capacity simply means longer runtime between charges, with zero compatibility issues.
Please make sure that the termination style shown in this listing will work for your application, as connector types can vary between models.
It’s also important to confirm that the dimensions of our suggested replacement match the battery you’re replacing to ensure a proper fit in your device or battery compartment.
Please double-check that the batteries you're ordering match the ones in your unit before completing your purchase. We want to make sure you get exactly what you need!
12V, 18Ah Replacement Battery for Sealake FM12140 with NB Terminals | 216Wh High-Capacity Power
Keep your equipment operating reliably with this premium 12V 18Ah Sealed Lead Acid (AGM) replacement battery for the Sealake FM12140. Designed as a dependable drop-in replacement, it delivers maintenance-free performance, durable construction, and consistent standby or cyclic power for demanding applications.
Technical Specifications
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Why Choose This Product
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- Direct replacement for the Sealake FM12140 battery.
- 12V, 18Ah output provides dependable standby and cyclic power.
- Sealed AGM technology is maintenance-free and spill-proof.
- Durable ABS construction for long service life.
- NB terminals provide secure electrical connections.
- Suitable for UPS systems, mobility equipment, emergency lighting, alarm systems, solar installations and telecom equipment.
- An 18Ah battery is suitable as a replacement even if your original battery has a different Ah rating; the Ah rating primarily affects runtime.
Compatible Models
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Typical Applications
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- UPS backup power systems
- Mobility scooters and mobility equipment
- Emergency lighting
- Alarm and security systems
- Solar energy systems
- Telecommunications equipment
Product Highlights
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- Premium 12V 18Ah AGM replacement battery.
- 216Wh energy capacity.
- Maintenance-free sealed construction.
- High discharge capability up to 180A.
- Compact 181 × 77 × 167 mm footprint.
- NB terminal configuration.
- Some connector changes may be required while existing cables are often reusable.
FAQs
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Will this replace the Sealake FM12140?
Yes. It is designed as a replacement battery for the Sealake FM12140. -
Does the higher Ah rating matter?
No. A different Ah rating mainly affects runtime between charges while remaining suitable as a replacement. -
Is the battery maintenance-free?
Yes. The sealed AGM design requires no watering or routine maintenance. -
Should I check the terminals before ordering?
Yes. Please verify the NB terminal type and battery dimensions before purchase.
Warranty & Returns
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Includes a 1-Year Replacement Warranty and a 30-Day Return Policy.
Ready to Power Your Equipment
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Upgrade your Sealake FM12140 with this dependable 12V 18Ah AGM replacement battery for reliable backup power and long-lasting performance. Please verify the battery dimensions and NB terminal configuration before ordering, as minor connector adjustments may be required.
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💡 Shipping heavy or bulk items?
If your order includes multiple heavy products, we recommend requesting a custom quote — we may be able to arrange a better rate with a transport truck!
Please note: We reserve the right to send heavier items by transport truck if the carrier's maximum weight per package is exceeded or if we consider it too risky to place with a courier due to the possibility of damage occurring.
🔋 What’s mAh All About?
🔋 What’s mAh All About?
mAh stands for milliamp hours—basically, how much "fuel" your battery can hold. A higher or lower mAh than your original battery? No worries! 🙌 It won’t affect charging or operation—just means your device might run a bit longer or shorter between charges. Still 100% compatible. Still 100% awesome. 💪✨
Before ordering please read
Before ordering please read
Ensure the original battery model number is mentioned in our product description and verify that your device model number is also listed in the description.
How to Look after your new lithium battery!!
How to Look after your new lithium battery!!
See how to look after your battery if its lithium Lithium Care
Delivery and Shipping
Delivery and Shipping
See our shipping policy and details at this link Shipping Details
ADVISORY:- ABOUT OUR IMAGES
📸 Send Us Your Battery Image
Not sure which replacement battery you need? Just snap a Photo / Video of your current battery and send it our way! Our team will quickly identify the exact match and recommend the perfect replacement model — no guesswork, no hassle.
🔍 Fast, Expert Assistance
We’ve helped thousands of customers find the right battery — let us do the same for you. Whether it’s for an alarm system, emergency light, or industrial equipment, we’ve got you covered.
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