Casil 12V 20Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery 2000+ Life Cycles & 10-Year Lifetime, Perfect for RV, Solar, Marine, Overland, Off-Grid Applications
- 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
- 12V
- Capacity
- 20Ah
- Cycle life
- 2,000+
- BMS
- Built-in
- Size (in)
- 7.13 × 3.03 × 6.57
- Weight
- 5 lb
Replacing an AGM? Check your setup
Overview
A lighter, longer-lasting 12V 20Ah battery
The Casil 12V 20Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery is a high-quality and durable battery designed for a wide range of applications. With over 2000 life cycles and a 10-year lifetime, this battery is perfect for use in RVs, solar systems, marine applications, overland vehicles, and off-grid setups.
This battery is made with Lithium Iron Phosphate (LiFePO4) technology, which provides a number of benefits over traditional lead-acid batteries. LiFePO4 batteries are more energy-efficient, have a longer lifespan, and are lighter and more compact, making them ideal for use in portable and mobile applications.
The Casil 12V 20Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery is designed to be deep-cycle, meaning it can discharge to a greater extent than standard batteries without causing damage to the battery or reducing its lifespan. This makes it an ideal choice for use in applications where long-lasting and reliable power is needed, such as in RVs, boats, and off-grid homes.
The battery is also 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 12V 20Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery is a top-quality choice for anyone looking for a reliable and long-lasting power source for their RV, solar system, boat, or off-grid setup.
- Lithium iron phosphate (LiFePO4)A stable, long-life chemistry with a built-in battery management system.
- 2,000+ rated cyclesBuilt for daily charge and discharge in solar, RV and marine use.
- About 5 lbA fraction of the weight of a lead-acid battery of the same capacity.
- Maintenance-freeNo watering, no venting, no acid.
- Standard case size7.13 × 3.03 × 6.57 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, and it is rated for 2,000+ cycles.
- Rated cycles
- 2,000+
- Weight
- 5 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.
Applications
Built for life off the grid
One battery for the places where a dead battery means a cold night or a long paddle home.
Capacity options
Pick the size of your bank
Same 12V LiFePO4 chemistry in other capacities.
Specifications
Full specifications
| Model | Casil LFP 12V 20Ah |
|---|---|
| Brand | Casil |
| SKU | 1x-LFP12.8V20AH-001-1X |
| UPC | 7.99E+11 |
| Nominal voltage | 12V |
| Rated capacity | 20Ah |
| Chemistry | Lithium iron phosphate (LiFePO4) |
| Length × width × height | 7.13 × 3.03 × 6.57 in (181 × 77 × 167 mm) |
| Weight | 5 lb (2.27 kg) |
| Cycle life | 2,000+ cycles (rated) |
| Battery management | Built-in BMS |
| Maintenance | Maintenance-free |
| Used in | Lithium LiFePO4, Mobility Scooters & Wheelchairs, Solar, Marine & RV |
| 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, Mobility Scooters & Wheelchairs, Solar, Marine & RV. Match voltage (12V), capacity (20Ah), 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 12V systems, yes — as long as it fits the space (7.13 × 3.03 × 6.57 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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