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SKU CA650-1X Replaces ML5-6 · PS-650

Casil CA650 6v 5ah Rechargeable Sealed Lead Acid Battery Battery

6V 5Ah F1 SLA / AGM
$16.99 each Was $19.54 Save 13%
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Voltage
6V
Capacity
5Ah
Terminal
F1 · 0.187″
Size (in)
2.76 × 1.85 × 3.94
Weight
2 lb
Type
SLA / AGM

Does this fit my model?

Overview

The 6V 5Ah battery for emergency lights and exit signs

Casil CA650 6v 5ah Rechargeable Sealed Lead Acid Battery is a 6V 5Ah 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: UPS backup, alarm systems, emergency lighting, mobility and backup power.

Compatible / Cross-Reference Searches: Mighty Max ML5-6, Power-Sonic PS-650. Match voltage, capacity, dimensions, terminal type and polarity before ordering; listed models are cross-reference search terms, not OEM affiliation claims.

Fit Details: F1 terminal. Always compare your original battery specifications before purchase.

Popular Search Terms: 6V 5Ah battery, 6 volt 5 amp hour battery, rechargeable SLA battery, sealed lead acid battery, AGM battery, battery replacement, 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 size2.76 × 1.85 × 3.94 in, a drop-in for ML5-6 and PS-650.
  • 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

Specifications for Casil CA650 6v 5ah Rechargeable Sealed Lead Acid Battery Battery
ModelCasil CA650
BrandCasil
SKUCA650-1X
Nominal voltage6V
Rated capacity5Ah
ChemistrySealed lead-acid, AGM (VRLA)
TerminalF1 — 0.187 in (4.75 mm) quick-connect
Length × width × height2.76 × 1.85 × 3.94 in (70 × 47 × 100 mm)
Weight2 lb (0.91 kg)
MaintenanceMaintenance-free, spill-proof
ReplacesML5-6, PS-650
Used inEmergency Lighting & Exit Signs, Ride-On Toys & Scooters, Mobility Scooters & Wheelchairs, Alarm & Security
Warranty1-year pro-rated
ConditionNew
ShippingFree shipping · ships from our US warehouse

Dimensions

Dimension drawing

Casil CA650 6V 5Ah, F1 dimension drawing: length 2.76 in (70 mm), width 1.85 in (47 mm), height 3.94 in (100 mm) FRONT & SIDE VIEWS · TERMINALS: (+) RED / (−) BLACK FRONT 2.76 in · 70 mm 3.94 in · 100 mm SIDE 1.85 in · 47 mm

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

Terminal comparison: F1 tab 0.187 in (4.75 mm), F2 tab 0.250 in (6.35 mm). This battery has F1 terminals. 0.187 in · 4.75 mm F1 — this battery 0.250 in · 6.35 mm 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 CA650 6V 5Ah, F1 — 2.76 × 1.85 × 3.94 in. Match voltage, size and terminal to your old battery before ordering.

Search another part number
Brand Part number Listed as Casil replacement
— ML5-6 Cross-reference CA650 · 6V · 5Ah · F1
— PS-650 Cross-reference CA650 · 6V · 5Ah · F1

Compatibility

Fits these devices

Used in Emergency Lighting & Exit Signs, Ride-On Toys & Scooters, Mobility Scooters & Wheelchairs, Alarm & Security. Match voltage (6V), capacity (5Ah), size and terminal to the battery you are replacing.

Find by device

Shipping & warranty

Shipping, returns & warranty

Full policies

Shipping

Free shipping on this battery. Order by 3 PM ET and it ships the same business day from our US warehouse.

Shipping details

Returns

Ordered the wrong size? Check the return window and how to send a battery back before you ship it.

Returns policy

Warranty

1-year pro-rated warranty. Keep your order number — the date code on the label shows when the battery was made.

Warranty terms

Buying 25 or more?

Get a written quote with business pricing for installers, facilities and resellers.

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FAQ

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 (6V), capacity (5Ah), size (2.76 × 1.85 × 3.94 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.