Casil YTX4L-BS Rechargeable Lithium Iron Phosphate LifePO4 Replacement Battery
$36.00
each
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Casil 6v 6ah rechargeable lithium iron phosphate lifepo4 battery
6V
6Ah
LiFePO4
$26.99
each
Free shipping
- In stock · Order by 3 PM ET, ships same business day from our US warehouse
- Free shipping on this battery · Shipping details
- Built-in BMS — protects against overcharge, over-discharge and short circuits
- 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
- Nominal voltage
- 6V
- Capacity
- 6Ah
- BMS
- Built-in
- Size (in)
- 2.75 × 1.85 × 3.94
- Weight
- 0.79 lb
Replacing an AGM? Check your setup
Overview
A lighter, longer-lasting 6V 6Ah battery
The Casil 6V 6Ah Rechargeable Lithium Iron Phosphate (LiFePO4) Battery is a high-performance battery designed for a variety of applications. With its advanced LiFePO4 technology, this battery provides superior energy efficiency, longer lifespan, and greater safety compared to traditional lead-acid batteries.
This 6V 6Ah battery is specifically designed for use in small, portable devices such as toys, security systems, emergency lighting, and other applications that require a reliable and long-lasting power source. Its compact size and lightweight design make it easy to transport and install, making it a great choice for on-the-go power needs.
The Casil 6V 6Ah Rechargeable Lithium Iron Phosphate Battery is also designed for deep-cycle use, meaning it can be discharged to a greater extent than traditional batteries without damaging the battery or reducing its lifespan. This makes it an ideal choice for use in devices that require consistent, reliable power over a longer period of time.
The battery is rechargeable, allowing it to be used repeatedly without the need for replacement. Additionally, it features built-in protection circuitry to prevent overcharging, over-discharging, and short-circuiting, ensuring safe and reliable operation.
Overall, the Casil 6V 6Ah Rechargeable Lithium Iron Phosphate Battery is a top-quality choice for anyone looking for a reliable and long-lasting power source for their portable devices. Its advanced LiFePO4 technology, deep-cycle capabilities, and built-in protection circuitry make it an ideal choice for a wide range of applications.
- Lithium iron phosphate (LiFePO4)A stable, long-life chemistry with a built-in battery management system.
- About 1 lbA fraction of the weight of a lead-acid battery of the same capacity.
- Maintenance-freeNo watering, no venting, no acid.
- Standard case size2.75 × 1.85 × 3.94 in.
- Fresh, date-coded stockMonth and year printed on the label for your service records.
LiFePO4 vs AGM
Same job. A fraction of the weight.
LiFePO4 holds its voltage almost to empty, so lights stay bright and inverters keep running until the battery is nearly drained.
- Weight
- 0.79 lb
Battery management system
The built-in BMS does the babysitting
It watches the cells and disconnects the battery before damage happens.
- OverchargeStops charging when the cells are full.
- Over-dischargeCuts off before the cells are drained too far.
- Short circuitDisconnects on a short across the terminals.
Capacity options
Pick the size of your bank
Same 6V LiFePO4 chemistry in other capacities.
Specifications
Full specifications
| Model | Casil LFP 6V 6Ah |
|---|---|
| Brand | Casil |
| SKU | 1x-LFP6.4V6AH-001-1X |
| UPC | 7.99E+11 |
| Nominal voltage | 6V |
| Rated capacity | 6Ah |
| Chemistry | Lithium iron phosphate (LiFePO4) |
| Length × width × height | 2.75 × 1.85 × 3.94 in (70 × 47 × 100 mm) |
| Weight | 0.79 lb (0.36 kg) |
| Battery management | Built-in BMS |
| Maintenance | Maintenance-free |
| Used in | Lithium LiFePO4, Emergency Lighting & Exit Signs |
| 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.
Compatibility
Where it’s used
Used in Lithium LiFePO4, Emergency Lighting & Exit Signs. Match voltage (6V), capacity (6Ah), 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
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
Lithium questions
Planning a bigger bank or a 24V system? Our team can help you size it.
Can I swap my AGM for this without other changes?
In most 6V systems, yes — as long as it fits the space (2.75 × 1.85 × 3.94 in). The one change is charging: set your charger, converter or solar controller to its LiFePO4 (lithium) profile, because AGM settings will not fully charge it.
Do I need a lithium charger?
Use a charger or controller with a LiFePO4 or lithium setting. Many modern chargers, converters and solar controllers have one. A lead-acid charger with a desulfation or equalize mode should not be used.
Can I connect batteries in series or parallel?
Use identical batteries of the same age and charge level, and check the series and parallel limits for this model with our team before you build a bank. Call 973-500-6828.
Can it be charged below freezing?
LiFePO4 batteries should not be charged below 32°F (0°C) unless they have low-temperature charge protection. Discharging in the cold is fine. Ask us about cold-weather setups for this model.
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.
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