Casil 33Ah Lithium Battery 12V LiFePO4 Rechargeable Battery with Built-in BMS, Perfect for Golf Caddy Trolling Motor on Small Fishing Boat Thrust Motor Sump Pump Solar Marine
- 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
- 33Ah
- Cycle life
- 2,000+
- BMS
- Built-in
- Size (in)
- 7.68 × 5.12 × 6.72
- Weight
- 9.59 lb
Replacing an AGM? Check your setup
Overview
A lighter, longer-lasting 12V 33Ah battery
The Casil 33Ah Lithium Battery is a powerful and reliable rechargeable battery designed for use in a variety of applications, including golf caddy, trolling motors on small fishing boats, thrust motors, sump pumps, solar systems, and marine applications. This battery is equipped with Lithium Iron Phosphate (LiFePO4) cells, which are known for their stability, high energy density, and long cycle life.
With a capacity of 33Ah and 12 volts, this battery offers a reliable power source for a wide range of applications. The battery is capable of providing up to 2000 cycles, which is significantly more than traditional lead-acid batteries. This makes it an ideal choice for applications that require a reliable and durable power source over an extended period.
The Casil 33Ah Lithium Battery is also equipped with a built-in Battery Management System (BMS) that helps to maintain optimal performance and safety during charging and discharging cycles. The BMS protects against overcharging, over-discharging, short circuits, and excessive temperatures, which ensures that the battery remains in optimal condition throughout its life.
The battery is compact and lightweight, which makes it easy to install and transport. It is also maintenance-free, which means that there is no need for periodic maintenance or replacement of the electrolyte, unlike traditional lead-acid batteries.
The Casil 33Ah Lithium Battery has a wide operating temperature range, which makes it suitable for use in extreme environments. It is also capable of delivering high discharge currents when required, making it ideal for applications that require a high power output.
Overall, the Casil 33Ah Lithium Battery is a reliable and durable power solution that is ideal for a wide range of applications. Its long cycle life, high energy density, and built-in safety features make it an excellent choice for anyone looking for a high-quality lithium battery for their golf caddy, trolling motor on small fishing boat, thrust motor, sump pump, solar system, or marine application needs
- 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 10 lbA fraction of the weight of a lead-acid battery of the same capacity.
- Maintenance-freeNo watering, no venting, no acid.
- Standard case size7.68 × 5.12 × 6.72 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
- 9.59 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 33Ah |
|---|---|
| Brand | Casil |
| SKU | 1x-LFP12.8V33AH-001-1X |
| UPC | 7.99E+11 |
| Nominal voltage | 12V |
| Rated capacity | 33Ah |
| Chemistry | Lithium iron phosphate (LiFePO4) |
| Length × width × height | 7.68 × 5.12 × 6.72 in (195 × 130 × 171 mm) |
| Weight | 9.59 lb (4.35 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, Golf Carts |
| 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, Golf Carts. Match voltage (12V), capacity (33Ah), 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 (7.68 × 5.12 × 6.72 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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Casil 33Ah Lithium Battery 12V LiFePO4 Rechargeable Battery with Built-in BMS, Perfect for Golf Caddy Trolling Motor on Small Fishing Boat Thrust Motor Sump Pump Solar Marine
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