​Yes, LiFePO₄ (LFP) batteries can replace lead-acid batteries, but using a lead-acid charge controller without adjustments is not recommended.​

Key Differences in Charging Profiles

Lead-acid chargers typically use a multi-stage charging process (bulk, absorption, float) with voltage ranges suited for lead-acid chemistry. LiFePO₄ batteries, however, require a different charging profile:​

• Absorption Voltage: 14.2V to 14.6V

• Float Voltage: Not necessary; if used, set to 13.5V to 13.8V

• Equalization: Should be disabled​

Using a lead-acid charger without adjustments can lead to: ​

• Undercharging: If the absorption voltage is too low

• Overcharging: If the charger doesn't terminate charging appropriately

• Reduced Lifespan: Due to improper charging cycles​

⚠️ Manufacturer Recommendations

Many LiFePO₄ battery manufacturers state that their batteries are "drop-in replacements" for lead-acid batteries. This is only true if the existing charging system is compatible or adjustable to meet LiFePO₄ charging requirements. Our LiFePO₄ batteries come with a built-in Battery Management System (BMS) that provides protection, but this doesn't replace the need for proper charging voltages. LiFePO4 batteries charged using lead-acid algorithms will have a shorter lifespan and can lose 20–30% of their capacity within 2–3 years.​

✅ Best Practices

• Use a Charger with a LiFePO₄ Profile: Ensure your charge controller or charger has a setting specifically for LiFePO₄ batteries.

• Adjust Settings Manually: If your charger allows, manually set the charging parameters to match LiFePO₄ requirements.

• Consult the Battery Manufacturer: Always refer to the battery manufacturer's guidelines for charging specifications.​

We import LFP batteries for our gate automation systems and require a specific order volume to secure the best price. Likewise, the cargo volume needs to meet certain size requirements to achieve favorable shipping conditions. As a result, we import more batteries than we need for automation and sell the surplus at an attractive price to ensure quick turnover. All batteries are of the highest quality and feature A-grade cells. Each model has undergone capacity testing and reliably holds the specified power. To date, no battery or BMS has experienced any failures.

Turtle Direct LiFePO₄ Battery Warranty Terms (NZ)

Warranty Coverage:

Turtle Direct warrants its LiFePO₄ batteries against manufacturing defects and workmanship for a period of 3 years from the date of purchase.

We guarantee that the battery will retain at least 80% of its rated capacity within the warranty period, provided it is used and maintained correctly.

Warranty Conditions:

• To qualify for warranty coverage: The battery must be installed, charged, and maintained according to the guidelines provided by Turtle Direct, including the use of a compatible charge controller designed specifically for LiFePO₄ batteries.
• The battery must not be subjected to extreme temperatures, excessive moisture, physical damage, misuse, abuse, or neglect.
• Damage caused by improper charging methods, including the use of chargers intended solely for lead-acid batteries, is not covered under this warranty.
• Exclusions: This warranty explicitly excludes: Normal wear and tear Damage resulting from unauthorized modifications or repairs Accidental damage or damage caused by natural disasters Warranty Claims To initiate a warranty claim, contact Turtle Direct with proof of purchase and a detailed description of the issue.
• Turtle Direct may require battery testing and inspection to validate the claim. The battery has to be returned to Turtle Direct at the cost of the buyer.
• Limitation of Remedies Turtle Direct reserves the right to remedy any valid claim by either providing a replacement battery or issuing a pro-rata-temporis refund based on the remaining warranty period, at our sole discretion.
• Consumer Rights This warranty is provided in addition to, and does not exclude or limit, your rights under the New Zealand Consumer Guarantees Act 1993.

A BMS (Battery Management System) is like the brain of a LiFePO₄ (LFP) battery. It protects the battery and makes sure it runs safely and efficiently.

Here’s what it does:

• Overcharge Protection: It stops charging if the voltage gets too high, which could damage the battery or cause a fire.
• Over-discharge Protection: It disconnects the load if voltage gets too low to prevent permanent damage.
• Cell Balancing: It evens out the voltage between cells so all cells age evenly and the battery performs better over time.
• Temperature Monitoring: It shuts down charging or discharging if temperatures are too hot or too cold.
• Short Circuit and Overcurrent Protection: It disconnects the battery instantly if there's a short or a power surge.