Product Specifications for 12V 20Ah LiFePO4 Rechargeable Battery with Balancing PCM (240Wh)
| BM Part #: | LF-GB4S20M |
|---|---|
| Voltage: | 12.8 Volt (Nominal) |
| Capacity: | 20 Ah |
| Energy Capacity: | 240 Wh |
| Type: | LiFePO4 |
| Length: | 7.0" |
| Width: | 3.0" |
| Height: | 6.7" |
| Shipping Weight: | 6.60Lbs |
| Warranty: | 1 Year |
- Built-In Balancing PCM: An integrated Protection Circuit Module actively balances cells after each full charge and guards against overcharge, over-discharge, excessive current draw, and short circuits — protecting both the battery and connected equipment.
- 240Wh with 30A Continuous Discharge: Generous capacity paired with a 30-amp PCM-limited discharge rate makes this battery well-suited for e-bikes, electric scooters, solar storage, and other higher-draw applications.
- 53% Lighter Than Lead-Acid: Weighing just 6.6 lbs compared to roughly 14 lbs for a comparable sealed lead-acid battery, this pack cuts weight in half without sacrificing capacity or output.
- 1,000+ Cycle Life: Rated for over 1,000 full charge cycles at 80%+ retained capacity per IEC standard — far beyond the 200–300 cycles typical of lead-acid batteries.
- Quality 26650 Cell Construction: Built from 24 LiFePO4 26650 cells in a 4S6P configuration, delivering a stable 12.8V working voltage and consistent performance throughout the life of the pack.
- Versatile Faston Connector: Prewired with three 90-degree Faston 0.25 brass tab connectors — a widely compatible standard that suits custom builds, retrofits, and flexible wiring configurations.
Product Description
When a 12V lead-acid battery is doing an important job — powering an e-bike, running a solar storage system, or keeping backup equipment online — its weight, bulk, and limited lifespan become real ongoing costs. This 12V 20Ah LiFePO4 battery addresses all three. It delivers 240Wh of usable energy in a package that weighs 6.6 lbs, includes a built-in balancing protection circuit, and is built to last through more than 1,000 full charge cycles.
Built From Quality Cells, Configured for Performance
This battery pack is assembled from 24 individual LiFePO4 26650 cells arranged in a 4S6P configuration — four cells in series to achieve the working voltage, six in parallel to build up the 20Ah capacity. This cell-level architecture gives the pack a solid foundation for consistent, high-current output. LiFePO4 chemistry is known for its thermal stability and long service life, and the 26650 cell format is a particularly robust platform for high-demand applications where both capacity and discharge rate matter.
Built-In Protection That Keeps the Battery Healthy
One of the standout features of this battery is its integrated PCM — a Protection Circuit Module — with an active cell balancing function. Most budget LiFePO4 packs include basic protection only; this one goes further by actively balancing the individual cells after a full charge, helping ensure they age evenly and that the full capacity of the pack remains available over time. The PCM also protects against overcharge, over- discharge, excessive current draw, and short circuits — covering the most common causes of premature battery failure.
One important usage note: the balancing function activates only after the battery has been fully charged. Allow at least 30 minutes after charging completes before putting the battery into service. Using it immediately after charging bypasses the balancing cycle, which won't damage the battery but will miss the benefit of that maintenance step.
240Wh With a 30-Amp Discharge Rate
With 20Ah of capacity and a maximum continuous discharge of 30 amps (limited by the PCM), this battery is well-matched for applications with meaningful power demands. E-bikes and electric scooters, in particular, benefit from both the capacity — which translates to extended range — and the 30A headroom, which handles motor startup surge and hill-climbing draw without stressing the cells. It's also a strong fit for solar energy storage, portable power stations, and backup power setups where you need a reliable reserve that won't run down quickly.
More Than Half the Weight of Lead-Acid
At 6.6 lbs, this battery is 53% lighter than a standard 12V 20Ah sealed lead-acid battery, which typically tips the scales at around 14 lbs. That weight reduction is meaningful in practically every application — whether it's reducing the unsprung weight on an e-bike, making a portable power system easier to carry, or simplifying installation in a tight compartment. The dimensions of 7.0" x 3.0" x 6.7" are similar to a standard SLA battery of this capacity, so in many setups it drops in without major modifications.
1,000+ Cycles of Reliable Service
This battery is rated for more than 1,000 charge cycles while retaining 80% or more of its initial capacity, tested to IEC standard. Compare that to the typical 200–300 cycles of a sealed lead-acid battery of similar size, and the math strongly favors LiFePO4 over the long run — fewer replacements, less downtime, and better value over the life of your equipment.
Flexible Connector for Easy Integration
The battery comes prewired with three 90-degree Faston 0.25 brass tab connectors — a widely used standard that works with a broad range of compatible terminals and wiring harnesses. It's a practical choice for custom builds, retrofits, and integrations where you need flexibility in how the battery connects to your system.
Where This Battery Fits
This 12V 20Ah pack is a strong fit for e-bikes and electric scooters requiring sustained 30A discharge capability, solar and off-grid energy storage systems, portable backup power stations, UPS applications, garden and hobby railroading, and any application currently running on a 12V 20Ah sealed lead-acid battery that would benefit from a lighter, longer-lived replacement.
Please note: This battery has not yet undergone UN38.3 transport certification testing. As a result, it is currently classified for prototype and testing use and is subject to specific shipping regulations for untested lithium batteries. Please review the applicable shipping guidelines before ordering.
Frequently Asked Questions
What makes this battery different from a standard LiFePO4 pack?
The key differentiator is the built-in balancing PCM. Standard protection circuits guard against electrical faults, but they don't actively manage the individual cells. This battery's PCM monitors and balances cell voltages after a full charge, which helps the cells age more evenly and maintains the full usable capacity of the pack over time. It's a meaningful advantage in any application where the battery will be cycled regularly.
How does the cell balancing work, and do I need to do anything special?
Balancing occurs automatically — but only after the battery has been fully charged. Once charging is complete, allow at least 30 minutes before connecting the battery to your device. This waiting period gives the PCM time to equalize the cell voltages. If you use the battery immediately after charging, no balancing takes place that cycle, though the battery will still operate normally.
Can this replace my existing 12V 20Ah lead-acid battery?
In most cases, yes. The dimensions (7.0" x 3.0" x 6.7") are similar to a standard 12V 20Ah SLA form factor. However, you'll need to verify the fit in your specific compartment, and you'll need a LiFePO4-compatible charger — a standard lead-acid charger should never be used with this battery.
What kind of charger does this battery require?
This battery requires a charger designed for 12.8V LiFePO4 battery packs. The maximum charge rate is 19.8 amps, though a lower-rate charger will work fine and is often the practical choice for everyday use. Do not use a standard lead-acid charger — the charge profiles are incompatible and can damage the battery.
Is this battery a good fit for an e-bike or electric scooter?
Yes, and it's one of the applications this battery is specifically noted for. The 30-amp PCM-limited discharge rate handles the startup surge and sustained draw of most hub and mid-drive motors in the 12V class, while the 240Wh capacity provides meaningful range. The 53% weight reduction over lead-acid is a particularly valuable advantage in any vehicle application.
Does this battery have UN38.3 transport certification?
Not at this time. This battery is currently classified for prototype and testing use and has not yet undergone UN38.3 certification testing. This affects how it can be shipped. Please review the applicable lithium battery shipping regulations before ordering to ensure compliance with your shipping method and carrier requirements.
