12V 300Ah LiFePO4 Lithium Battery - Compact Size (10 Year Warranty)
12V 300Ah LiFePO4 Lithium Battery - Compact Size (10 Year Warranty)
12V 300Ah LiFePO4 Lithium Battery - Compact Size (10 Year Warranty)
12V 300Ah LiFePO4 Lithium Battery - Compact Size (10 Year Warranty)
12V 300Ah LiFePO4 Lithium Battery - Compact Size (10 Year Warranty)
12V 300Ah LiFePO4 Lithium Battery - Compact Size (10 Year Warranty)
12V 300Ah LiFePO4 Lithium Battery - Compact Size (10 Year Warranty)
12V 300Ah LiFePO4 Lithium Battery - Compact Size (10 Year Warranty)
12V 300Ah LiFePO4 Lithium Battery - Compact Size (10 Year Warranty)
12V 300Ah LiFePO4 Lithium Battery - Compact Size (10 Year Warranty)
12V 300Ah LiFePO4 Lithium Battery - Compact Size (10 Year Warranty)
12V 300Ah LiFePO4 Lithium Battery - Compact Size (10 Year Warranty)
12V 300Ah LiFePO4 Lithium Battery - Compact Size (10 Year Warranty)

Dr.Prepare

12V 300Ah LiFePO4 Lithium Battery - Compact Size (10 Year Warranty)

$349.99 USD $499.99 USD
Save $150.00USD
SKU: DBT12300LFP-S48-DCF-1BK25
Qty:1 pack with free fan
Quantity:

Please allow up to 1 to 2 business days for processing. Standard shipping may take up to 4 to 6 business days.

Contact Us

Dr.Prepare 12V 300Ah LiFePO4 Battery, 200A BMS Rechargeable Lithium Battery with 10 Year Lifespan, 3840Wh Higher Energy, Compact Size, Perfect for RVs, Solar, Boats, Off-Grid, Emergency Backup

Dr.Prepare 12V 300Ah LiFePO4 Battery features Grade A+ high energy density cells and a 10-year lifespan. It delivers a true-rated capacity of 3,840Wh and is equipped with a robust 200A BMS for efficient power distribution and enhanced safety.

Though it offers three times the capacity, its compact design is only slightly larger than a standard 12V 100Ah battery—making it highly portable, space-saving, and easy to install with simplified wiring and quicker setup.

Perfect for off-grid living, RVs, home energy storage systems, marine applications, and emergency backup power during outages. Upgrade from heavy sealed lead-acid batteries to this lighter, safer LiFePO4 solution that delivers 3,000+ cycles at 80% depth of discharge.

 

Description

  • 【Compact Size, True 3,840Wh, 10-Year Lifespan】 Measuring 15.16" (L, including side handles) × 7.68" (W) × 10.24" (H, including terminals), this compact 12V 300Ah LiFePO4 battery delivers 3× the energy of a standard 100Ah battery—without taking up 3× the space. With a true-rated capacity of 3,840Wh, it provides longer-lasting power for your appliances. Backed by a 10-year lifespan and product support, Dr.Prepare 300Ah LiFePO4 battery is built for performance you can count on.
  • 【Grade A+ High Density Cells, 200A BMS】 Dr.Prepare 12V 300Ah LiFePO4 Battery is built with Grade A+ high energy density cells for stable, long-lasting power. With a robust 200A continuous discharge rate, this lithium battery easily handles high-power appliances. Advanced BMS offers full protection against overcharge, over-discharge, short circuits, and low/high temperature.
  • 【Upgrade to Dr.Prepare LiFePO4 Batteries】 Dr.Prepare lithium batteries offer a major upgrade over traditional SLA batteries — lasting up to 10 years, compared to just 1–3 years for most SLA options. Weighing only 57 lbs, this 12V 300Ah LiFePO4 battery is 70% lighter than three 100Ah SLA batteries combined, while delivering more consistent and reliable power. It also features a built-in 200A BMS for advanced protection — something SLA batteries simply can't match.
  • 【Series & Parallel Ready, Scalable Power Expansion】 Supports both series and parallel configurations. Build a 24V, 36V, or 48V battery bank with series wiring, or expand to 12V 600Ah, 900Ah, or 1200Ah with parallel connections. Link up to 16 batteries (4P4S) to create a powerful 61.44kWh home backup system—perfect for outages, hurricane season, or running high-demand appliances.
  • 【Charging & Discharging】 Supports solar charging (must be used with a charge controller) and compatible AC-to-DC LiFePO4 battery chargers. Do not use general-purpose or SLA chargers, as they may cause damage. Optimal charging current: 60A (max: 100A). Max continuous discharge current: 200A.
  • 【Important Reminders】 1. Ensure the battery terminals are securely fastened. Loose terminals can lead to heat accumulation and potential battery damage. 2. After a full discharge at a continuous 200A, avoid immediate recharging at 100A, as this may trigger high-temperature charging protection. 3. Optimal charging involves a 60A current for this lithium battery. While the maximum charging current stands at 100A, exceeding this limit can result in a shortened battery lifespan.

 

Key Features

 

Package Includes 

12V 300Ah Lithium Iron Phosphate (LiFePO4) Battery     x 1
M8 Bolts     x 2
User Manual     x 1

 

Specifications

Dr.Prepare 12V 300Ah Lithium Iron Phosphate (LiFePO4) Battery
Technical Specifications
Rated Capacity (77°F / 25℃) 300Ah
Rated Voltage 12.8V
Energy
 3840Wh
Cycle Life 3,000 Cycles at 80% DOD
Max. Continuous Discharge Current 200A
Max. Charging Voltage 14.6V
Charging Current Optimal: 60A; Maximum: 100A
Discharge Cut-off Voltage
 Lower than 9.2V
Over-discharge Recovery Voltage 11V
Connection Method
 		In Series (up to 4);
In Parallel (up to 4);
In Parallel and Series (up to 16 batteries)
Charging Temperature Range
 32℉~113℉ / 0℃~45℃
Discharging Temperature Range 14℉~113℉ / -10℃~45℃
Low Temperature Protection Charging: 23℉~41℉ / -5℃~5℃
Discharging: -13℉~5℉ / -25℃~-15℃
High Temperature Protection
 		Charging: 140℉~158℉ / 60℃~70℃
Discharging: 149℉~167℉ / 65℃~75℃
Storage Temperature Range 59℉~86℉ / 15℃~30℃, 55-75% RH
Recommended Operating Temperature
 68℉~86℉ / 20℃~30℃
Terminal Bolt Size
 M8 x 14mm
Recommended Terminal Torque
 16 - 25 N·m
Controller Setting (for reference)
System Voltage
 12V (x N)*
Boost Charge Voltage
 14.2V (x N)*
Over-discharge Voltage
 11.1V (x N)*
Over-discharge Recover Voltage
 12.6V (x N)*
(× N): When building a 24V (N=2) or 48V (N=4) system, the total voltage equals the number of series-connected batteries multiplied by the nominal voltage of a single battery (12V).
Weight & Dimensions
Weight
 57.32 lbs / 26 kg
Dimensions
 15.16" (L, including side handles) × 7.68" (W) × 10.24" (H, including terminals)
385 x 195 x 260 mm
Warranty
10-year material warranty

 

 

Download

Can it be used in cold weather?
Yes — the Dr.Prepare 12V 300Ah LiFePO4 battery is equipped with low-temperature cut-off protection.

Charging cut-off range: 23℉ to 41℉ (-5℃ to 5℃)
Discharging cut-off range: -13℉ to 5℉ (-25℃ to -15℃)
The battery will automatically resume operation once the temperature rises above the cut-off point, helping to prevent damage in extreme cold conditions.
Can I use my sealed lead-acid battery charger to charge this LiFePO4 battery?
No, you can't. Using a sealed lead-acid (SLA) charger may cause irreversible damage to the battery. You must use a compatible LiFePO4 (lithium iron phosphate) AC-to-DC charger.

If you're using a solar off-grid system, you can charge the battery with solar panels and a charge controller that supports LiFePO4 batteries. Make sure to set the controller to the LiFePO4 battery type and configure the correct charging voltage.
Does this battery have low voltage cut-off protection?
Yes, it does. The battery will automatically shut off when the discharge voltage drops below 9.2V to protect against over-discharge. It will recover once the voltage rises above 11V.

If the battery enters low voltage protection mode, follow these steps to restore it:
1. Disconnect all wiring.
2. Use a LiFePO4-compatible charger or solar charge controller with an activation function.
3. Make sure the ambient temperature is above 41℉ (5℃) and charge the battery until the voltage exceeds 11V.
Will the battery come with terminals? And if not, what size are the connector terminals?
Yes, the battery comes with a pair of M8 × 14mm terminals.
Can I charge the battery directly using a solar panel?
No, you can't. When charging this battery with a solar panel, you must use a solar charge controller (either PWM or MPPT) between the panel and the battery. Directly connecting the panel to the battery can lead to unstable power output, which may damage the battery or connected devices.
Can this battery be used as a starter battery?
No, it can't. This battery is designed for low to moderate continuous power applications that require stable energy storage and delivery, such as RVs, off-grid solar systems, and home energy storage.

It is not suitable for applications that require high starting currents or power surges, such as engine cranking for cars or boats, or use in golf carts.
More questions about this product? Please contact us .

 

Customer Reviews

Based on 3 reviews
100%
(3)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
O
Oswald
Great for inexpensive system

This battery has been a game-changer for my trailer setup—outstanding performance for the price. To put it to the test, I powered a small cube fridge through a 2000W inverter, and it ran for an incredible 80 hours on a single charge. The trailer's built-in converter/charger had the battery back at 100% by morning. Now I can travel with the fridge running non-stop and enjoy worry-free off-grid camping for days at a time.

E
Eugster
Just great

It just works—no complaints so far. I’m running two of these in series for a 24V setup, and the power delivery is rock-solid. Best part? Zero setup or fuss—just plug and play. For peace of mind, I pre-connected a shunt to monitor performance, but honestly, it’s been hassle-free. Definitely buying more soon.

A
A.B
Replace my heavy duty batteries

I replaced two heavy 6V 200Ah lead-acid batteries (wired in series) with this 12V 300Ah LiFePO4 battery, and the difference is incredible. Not only is it half the weight, but the usable capacity feels closer to 80%—way better than the old 50% limit I had with lead-acid.
In my travel trailer, it easily powered a mini-fridge (12V DC → inverter → 120V AC) for about two hours, and the voltage only dropped from 13.6V to 13.5V during that time—even while solar charging.
The initial charge took about 3-4 hours after unboxing. This is my first lithium battery, and so far, I’m really impressed!