MINI LiFePO4 12V 300Ah
Best for off-grid motorhomes running an inverter or a large solar setup, and anyone who wants to monitor charge from their phone.
Mjbsan 12V 300Ah LiFePO4 vs Mjbsan 12V 320Ah LiFePO4
We compare the Mjbsan 12V 300Ah LiFePO4 and the Mjbsan 12V 320Ah LiFePO4 across every dimension that matters - our scores, the key specs, and how each performs on the things you will actually notice day to day.
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At a glance
| Mjbsan 12V 300Ah LiFePO4 | Mjbsan 12V 320Ah LiFePO4 | |
|---|---|---|
| Our score | 6.7/10 | 8.3/10 |
| Best for | off-grid motorhomes running an inverter or a large solar setup, and anyone who wants to monitor charge from their phone | off-grid motorhomes running an inverter or a large solar setup, and anyone who wants to monitor charge from their phone |
| Not ideal for | buyers on the tightest budget, as lithium costs more upfront than lead-acid | buyers on the tightest budget, as lithium costs more upfront than lead-acid |
| Brand | Mjbsan | Mjbsan |
Specifications compared
| Mjbsan 12V 300Ah LiFePO4 | Mjbsan 12V 320Ah LiFePO4 | |
|---|---|---|
| Voltage and capacity | 12V 300Ah | 12V 320Ah |
| Battery type | Lithium (LiFePO4) | Lithium (LiFePO4) |
| Stored energy | About 3,840Wh | About 4,096Wh |
| Rated cycles | Up to 15,000 | Up to 12,000 |
| BMS | 200A | 250A |
| Bluetooth monitoring | Yes | Yes |
| Low-temperature protection | Yes | Yes |
| Weight | 26kg | 34kg |
Battery Type and Chemistry
Mjbsan 12V 300Ah LiFePO4
As a lithium iron phosphate battery it is sealed and maintenance-free, and it holds a steady voltage until it is almost empty, so lights and pumps don't dim as the charge runs down.
Mjbsan 12V 320Ah LiFePO4
As a lithium iron phosphate battery it is sealed and maintenance-free, and it holds a steady voltage until it is almost empty, so lights and pumps don't dim as the charge runs down.
Capacity and Real Usable Power
Mjbsan 12V 300Ah LiFePO4
The Mjbsan is a 12V 300Ah lithium iron phosphate (LiFePO4) battery that stores about 3,840Wh, and because lithium can be run close to empty, a 50W load such as a compressor fridge could run for roughly 69 hours from full.
Mjbsan 12V 320Ah LiFePO4
The Mjbsan is a 12V 320Ah lithium iron phosphate (LiFePO4) battery that stores about 4,096Wh, and because lithium can be run close to empty, a 50W load such as a compressor fridge could run for roughly 74 hours from full.
Cycle Life and Durability
Mjbsan 12V 300Ah LiFePO4
The listing quotes up to 15,000 charge cycles, several times more than a typical lead-acid leisure battery, so it suits frequent off-grid use. A built-in 200A battery management system (BMS) protects against overcharging, over-discharge and short circuits, and limits continuous current to about 200A, so check that figure against your inverter.
Mjbsan 12V 320Ah LiFePO4
The listing quotes up to 12,000 charge cycles, several times more than a typical lead-acid leisure battery, so it suits frequent off-grid use. A built-in 250A battery management system (BMS) protects against overcharging, over-discharge and short circuits, and limits continuous current to about 250A, so check that figure against your inverter.
Fitting and Charging
Mjbsan 12V 300Ah LiFePO4
The Mjbsan weighs about 26kg, much lighter than a lead-acid battery of similar capacity, which helps with a motorhome's payload. Low-temperature protection stops it charging in freezing weather, which matters for winter touring because charging lithium below 0°C can damage the cells. Bluetooth monitoring lets you check the charge level and current draw from your phone.
Mjbsan 12V 320Ah LiFePO4
The Mjbsan weighs about 34kg, much lighter than a lead-acid battery of similar capacity, which helps with a motorhome's payload. Low-temperature protection stops it charging in freezing weather, which matters for winter touring because charging lithium below 0°C can damage the cells. Bluetooth monitoring lets you check the charge level and current draw from your phone.
Who Is This For?
Mjbsan 12V 300Ah LiFePO4
The Mjbsan 12V 300Ah LiFePO4 battery is designed for deep-cycle, long-life power for steady, demanding use cases such as a motorhome, a boat, or off-grid solar and camping setups. Built-in Bluetooth adds convenient monitoring without separate hardware. It is less suitable for anyone needing a lightweight, space-saving option or a starter battery for cranking, since the intended use is deep-cycle rather than high-burst starting power.
Mjbsan 12V 320Ah LiFePO4
Who is this LEISURECELL Mjbsan 12V 320Ah underseat self-heating LiFePO4 battery for? It is designed for people running motorhomes or off-grid systems that need 12V power storage. Its low-temperature protection and self-heating design make it relevant for users who may face cold conditions. It is also suited to solar setups that require longer daily buffering, with a capacity of 4096Wh and a built-in 250A BMS. The battery is built for long cycle life, with a 12,000-cycle rating and an expected 10-year life.
Mjbsan 12V 300Ah LiFePO4: pros
- Lithium (LiFePO4) - most usable capacity and longest life
- 300Ah at 12V
- Suits motorhome, marine, solar / off-grid
- Built-in BMS, Bluetooth monitoring
Cons
- Higher upfront cost, and needs a lithium-profile charger
- Avoid charging below freezing without low-temp protection
- Match the capacity to your real daily power draw
Mjbsan 12V 320Ah LiFePO4: pros
- Lithium (LiFePO4) - most usable capacity and longest life
- 320Ah at 12V
- 12000 cycles rated life
- Suits motorhome, solar / off-grid
- Built-in BMS
Cons
- Higher upfront cost, and needs a lithium-profile charger
- Avoid charging below freezing without low-temp protection
- Match the capacity to your real daily power draw
Our verdict
Our pick is the Mjbsan 12V 320Ah LiFePO4 (our score 8.3/10) - A 12V 320Ah lithium leisure battery with about 4,096Wh of storage and up to 12,000 rated cycles. The Mjbsan 12V 300Ah LiFePO4 is still worth it if it is cheaper when you check, or if it better matches your specific needs.
Neither quite right? Also worth considering
SuperBatt SB HL500 130Ah Leisure Battery
Best for caravans and motorhomes on weekend trips and hook-up sites.