CASIL CA-1240 12V 4AH Rechargeable Sealed Lead Acid Alarm Battery
- In stock · Order by 3 PM ET, ships same business day from our US warehouse
- Free shipping on this battery · Shipping details
- Fresh stock, date-coded on the label — you know exactly how old it is
- 1-year pro-rated warrantyTerms on every listing
- Free shippingOn most batteries
- Ships from US warehousePacked and shipped from US stock
- Fresh, date-coded stockEvery battery date-stamped
- Talk to a person973-500-6828
- Secure checkoutEncrypted, PCI-compliant payments
- Voltage
- 12V
- Capacity
- 4Ah
- Terminal
- F1 · 0.187″
- Size (in)
- 3.54 × 2.76 × 4.02
- Weight
- 3 lb
- Type
- SLA / AGM
Does this fit my model?
Overview
The 12V 4Ah battery for alarm and security panels
CASIL CA-1240 12V 4AH Rechargeable Sealed Lead Acid Alarm Battery is a 12V 4Ah rechargeable sealed lead acid (SLA/AGM) battery built for dependable, maintenance-free replacement power. Its sealed AGM/VRLA design is suited for standby and cyclic applications.
Applications: home security systems, alarm panels, access control, backup power.
Fit Details: F1 terminal. Always compare your original battery specifications before purchase.
Popular Search Terms: 12V 4Ah battery, 12 volt 4 amp hour battery, rechargeable SLA battery, sealed lead acid battery, AGM battery, battery replacement, alarm battery, security system battery, F1 terminal.
- Maintenance-free AGM (VRLA)Sealed and spill-proof — no watering, no acid to top up.
- F1 quick-connect terminals0.187 in (4.75 mm) tabs — the size most alarm panels use.
- Built to the original size3.54 × 2.76 × 4.02 in, a drop-in for EXP1240 and UB1240.
- Fresh, date-coded stockMonth and year printed on the label for your service records.
- 1-year pro-rated warrantyBacked by Casil USA, with phone support at 973-500-6828.
Specifications
Full specifications
| Model | Casil CA1240 |
|---|---|
| Brand | Casil |
| SKU | P9-V1H2-RB5H-1X |
| Nominal voltage | 12V |
| Rated capacity | 4Ah |
| Chemistry | Sealed lead-acid, AGM (VRLA) |
| Terminal | F1 — 0.187 in (4.75 mm) quick-connect |
| Length × width × height | 3.54 × 2.76 × 4.02 in (90 × 70 × 102 mm) |
| Weight | 3 lb (1.36 kg) |
| Maintenance | Maintenance-free, spill-proof |
| Replaces | EXP1240, UB1240, ML4-12, PS-1240 and more — see all |
| Used in | Alarm & Security, Emergency Lighting & Exit Signs |
| Warranty | 1-year pro-rated |
| Condition | New |
| Shipping | Free shipping · ships from our US warehouse |
Dimensions
Dimension drawing
Drawn to scale from the listed dimensions. Terminal positions are shown for reference — check the polarity marks on your old battery.
Terminal: F1 vs F2
Check the width of the tab on your old battery. F1 fits most small alarm panels; many UPS units use F2.
Cross-reference
Replaces these part numbers
Listed cross-references for the Casil CA1240 12V 4Ah, F1 — 3.54 × 2.76 × 4.02 in. Match voltage, size and terminal to your old battery before ordering.
Compatibility
Fits these devices
Used in Alarm & Security, Emergency Lighting & Exit Signs. Match voltage (12V), capacity (4Ah), size and terminal to the battery you are replacing.
Shipping & warranty
Shipping, returns & warranty
Shipping
Free shipping on this battery. Order by 3 PM ET and it ships the same business day from our US warehouse.
Shipping detailsReturns
Ordered the wrong size? Check the return window and how to send a battery back before you ship it.
Returns policyWarranty
1-year pro-rated warranty. Keep your order number — the date code on the label shows when the battery was made.
Warranty termsBuying 25 or more?
Get a written quote with business pricing for installers, facilities and resellers.
Request a quoteFAQ
Before you swap it
Not sure it matches your old battery? Our team checks part numbers every day.
Will this fit my device?
Match the voltage (12V), capacity (4Ah), size (3.54 × 2.76 × 4.02 in) and terminal (F1) to your old battery, or use the fit check at the top of this page.
What is the difference between F1 and F2 terminals?
F1 tabs are 0.187 in (4.75 mm) wide; F2 tabs are 0.250 in (6.35 mm). The connectors on your device's leads are sized for one or the other, so match the tab width on your old battery. This battery has F1 terminals.
How often should it be replaced?
Sealed lead-acid batteries in standby equipment such as alarm panels, fire panels and UPS units are typically replaced every 3–5 years, or sooner if the system reports a low battery or fails its load test. The date code on the label shows when the battery was made.
Can I use a battery with more amp-hours?
Usually, if the voltage, case size and terminals match: more amp-hours means longer runtime. Check that it fits the compartment and that your charger can recharge it in the time your system requires.
How does it ship?
Shipping is free on this battery. Orders placed by 3 PM ET ship the same business day from our US warehouse. See shipping details.
Reviews
What buyers say
5 out of 5 · 20 reviews
-
Battery
Pick delivery battery is working fine
Art Szulborski · Jan 26th 2026
-
Home security battery
Fast service and easy peasy to replace. Savings substantial as well.
Robert A. Rorke · Aug 5th 2021
-
Predator caller battery
Exact replacement works great
Jethro · Feb 1st 2021
-
Super quick delivery-Great service!
But it!
DOMINIC V COPPOLA · Nov 19th 2020
-
CASIL CA-1240
Works well, came with protective plastic terminal protectors to keep it from discharging and not get damaged.
ds · Nov 12th 2020
-
Exact replacement battery
Easy to install. Powered up my dead security system right away. Very fast shipping. Too soon to comment on battery longevity. Thanks for the great price on a Casil battery.
Mai Phan · Oct 22nd 2020
-
CA-1240 12V 4AH
Very Pleased
Kenneth Weatherbee · Sep 16th 2020
-
Perfect replacement
Plug and play
Curt Bates · Sep 15th 2020
-
Casil CA-1240 Battery
Outstanding battery and longevity. Just replaced 16 year old original Casil CA-1240 battery in my home security system. Definitely a quality product. Best regards
S. McCoy · Sep 13th 2020
Write a Review
Casil
CASIL CA-1240 12V 4AH Rechargeable Sealed Lead Acid Alarm Battery
Related
