Casil YTX4L-BS Rechargeable Lithium Iron Phosphate LifePO4 Replacement 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
- Rated 150 CA (cranking amps)
- 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
- 12V
- Capacity
- 2.5Ah
- Cycle life
- 2,000+
- Size (in)
- 4.41 × 2.80 × 3.35
- Weight
- 1.32 lb
- Replaces
- YTX4L-BS
Replacing an AGM? Check your setup
Overview
A lighter, longer-lasting 12V 2.5Ah battery
Casil YTX4L-BS Rechargeable Lithium Iron Phosphate LifePO4 Replacement Battery
- [High Energy] Lithium Ion Phosphate Battery(LifePO4) has low internal resistance, stable voltage, good high and low temperature performance. It can start motorcycle and other electronic equipment in the range of -4°F to 140°F(-20°C to 60°C) easily.
- [Safety and Convenient] Lithium Motorcycle Battery has the heavy case to protect the battery from weather and dust. And the battery components are free of any lead acid, safe and environmentally-friendly. It can be used and charged at any time.
- [Lightweight and High Efficiency] Lithium Ion Powersport battery just 1.32 LB. Delivers over 150Amps, over 50000 starts and over 2000 charge cycles, provide the higher capacity and lasting longer.
- [Compatible] Maxlithium Lithium Motorcycle Battery works with a variety of vehicle type, such as motorcycles, ATV, UTV, Scooter, Dirt Bike, Snowmobile, Personal Watercraft, Lawn Mower and more.
- [Fitment] Maxlithium Lithium Ion Phosphate Battery also replace battery size: YTX4L-BS, YTZ5S-BS, YTX5L-BS, YTZ6-BS, YTZ7S-BS, YTX7L-BS.
- [Packing] 12V 2.5Ah 150CA Lithium Motorcycle Battery * 1, Screw * 2. Kindly please the size of your Electronic Device Battery Compartment before purchasing. And if you have any questions, feel free to contact us by amazon message.
- Lithium iron phosphate (LiFePO4)A stable, long-life chemistry.
- 2,000+ rated cyclesBuilt for daily charge and discharge in solar, RV and marine use.
- About 1 lbA fraction of the weight of a lead-acid battery of the same capacity.
- Maintenance-freeNo watering, no venting, no acid.
- Built to the original size4.41 × 2.80 × 3.35 in, a drop-in for YTX4L-BS and YTZ5S-BS.
- Fresh, date-coded stockMonth and year printed on the label for your service records.
- 3-year pro-rated warrantyBacked by Casil USA, with phone support at 973-500-6828.
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, and it is rated for 2,000+ cycles.
- Rated cycles
- 2,000+
- Weight
- 1.32 lb
Capacity options
Pick the size of your bank
Same 12V LiFePO4 chemistry in other capacities.
Specifications
Full specifications
| Model | Casil LFP YTX4L |
|---|---|
| Brand | Casil |
| SKU | LFP-YTX4L |
| Nominal voltage | 12V |
| Rated capacity | 2.5Ah |
| Chemistry | Lithium iron phosphate (LiFePO4) |
| Replaces size | YTX4L-BS |
| Length × width × height | 4.41 × 2.80 × 3.35 in (112 × 71 × 85 mm) |
| Weight | 1.32 lb (0.60 kg) |
| Cycle life | 2,000+ cycles (rated) |
| Maintenance | Maintenance-free |
| Replaces | YTX4L-BS, YTZ5S-BS, YTX5L-BS, YTZ6-BS and more — see all |
| Used in | Powersports, Lithium LiFePO4 |
| Warranty | 3-year pro-rated |
| Notes | Rated 150 CA (cranking amps) |
| 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.
Cross-reference
Replaces these part numbers
Listed cross-references for the Casil LFP YTX4L 12V 2.5Ah — 4.41 × 2.80 × 3.35 in. Match voltage, size and terminal to your old battery before ordering.
Compatibility
Fits these devices
Used in Powersports, Lithium LiFePO4. Match voltage (12V), capacity (2.5Ah), 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
3-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
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 12V systems, yes — as long as it fits the space (4.41 × 2.80 × 3.35 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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