DEFORD unveils their sodium-ion lawn tractor batteries in January 2025.
After more than 9 months of tests, DEFORD New Power Co., Ltd. releases two models sodium-ion lawn tractor batteries in January 2025. NA1210 and NA1220 lawn tractor batteries are based on sodium-ion battery technology. The launch of sodium lawn tractor batteries will fundamentally change the landscape of the lawn tractor battery market in the next few years.
Lead acid battery has been dominated the lawn tractor battery market for decades. Lithium-ion battery is not good at cold-starting the engine and therefore cannot meet the requirements of starting batteries. Sodium-ion battery has excellent low-temperature discharge performance and can still keep high power even at -28 degrees Celsius. In terms of CCA performance, sodium-ion battery is even more advantageous than lead acid battery.
Lead acid battery should strictly avoid over-discharge to prevent irreversible loss on capacity. Whilst Sodium-ion battery is not afraid of over-discharge and can be discharged to 0V, there will be no loss of capacity after recharging. Lead-acid battery usually need to be charged every 3 months to keep the performance, while sodium-ion battery can extend the charging time to 12 months.
The abundance of sodium in the earth's crust is 2.3%, ranking sixth among all elements, significantly higher than 0.0017% of lithium. Sodium is widely found on land and in the ocean in the form of salt and is easy to obtain. Compared with lead-acid battery, sodium-ion battery is eco-friendly. Sodium-ion battery does not contain any heavy metals and are 100% recyclable.
To help customers understand the differences of lawn tractor battery between sodium-ion chemistry and lead-acid chemistry, the NA1220 is compared with a typical lead acid BCI Group U1 battery as follows:
Item | NA1220 | BCI Group U1 |
Battery Chemistry | Sodium | Lead |
Nominal Voltage | 12V | 12V |
Capacity Density | 80Wh/kg | 40Wh/kg |
Energy | 240Wh @ 1C discharge | 360Wh @ 0.05C discharge |
Heavy Metals | Eco-friendly | Lead |
Weight | 3.4 kg | 8.5 kg |
Charge Temperature | 0℃ < T < 45℃ | -20℃ < T < 50℃ |
Discharge Temperature | -40℃ < T < 60℃ | -20℃ < T < 50℃ |
Over-discharge | As low as to 0V | 10.5V |
Storage Without Maintenance | 12 months | 3 months |
Cold Cranking Amps (CCA) | 300 | 350 |
Life Cycle | 1,500 | 500 |
Expected Life Cycle (Years) | 5 - 8 | 2 - 3 |
Cost Per Use | $0.05 | $0.12 |
The performance parameters of NA1210 lawn tractor battery can be obtained from the following table.
Part Number | NA1210 |
Battery Chemistry | Sodium-ion |
Nominal Battery Voltage (V) | 12 |
Nominal Battery Capacity (Ah) | 10 |
Minimum Battery Capacity (Ah) | 9 |
Nominal Battery Energy Capacity (Wh) | 120 |
Type of Cell | Cylindrical |
Cell Configuration | 4S1P |
Cycle Life | 1,500 cycles at 100% DOD, at 25℃ / 0.5C current |
3,000 cycles at 85% DOD, at 25℃ / 0.5C current | |
Battery Management System (BMS) | Built-in and integrated |
Charge Voltage (V) | 15.4 |
Float Charge (V) | 14.6 (85% SoC) |
Max Charge Current (A) | 15 (10℃~35℃) |
Recommended Charge Current (A) | 3 - 5 |
Discharge Cut-off Voltage (V) | 8.8 |
Max Continuous Discharge Current (A) | 20 (10%~100% SOC) |
Cold Cranking Amps (CCA) | 150A |
External Short Circuit | Prohibition |
Operating Temperature Charge (℃) | 0 - 45℃ |
Operating Temperature Discharge (℃) | -40 - 60℃ |
Storage Temperature (℃) | -20 - 35℃ with 50% - 60% SOC |
Store Time @ Storage Temperature | 12 months |
Humidity (non-condensing) | 10% - 90% |
Battery Terminals | Bolt & nut |
Torque: 5 - 6 Nm | |
Battery Box Material | ABS + PC |
Ingress Protection (IP) | IP56 |
Cooling | Natural convection |
Battery Outer Dimensions (L x W x H) | 181 x 77 x 170 mm |
7.1 x 3.0 x 6.7 inch | |
Weight | 1.7 kg / 3.8 lb |
Mounting Position | Upright |
Fuse | Use appropriate fuse as close to battery positive (+) terminal as possible |
BMS Power Consumption | Max 0.2mA |
Application | Lawn tractor |
The performance parameters of NA1220 lawn tractor battery can be obtained from the following table.
Part Number | NA1220 |
Battery Chemistry | Sodium-ion |
Nominal Battery Voltage (V) | 12 |
Nominal Battery Capacity (Ah) | 20 |
Minimum Battery Capacity (Ah) | 18 |
Nominal Battery Energy Capacity (Wh) | 240 |
Type of Cell | Cylindrical |
Cell Configuration | 4S2P |
Cycle Life | 1,500 cycles at 100% DOD, at 25℃ / 0.5C current |
3,000 cycles at 85% DOD, at 25℃ / 0.5C current | |
Battery Management System (BMS) | Built-in and integrated |
Charge Voltage (V) | 15.4 |
Float Charge (V) | 14.6 (85% SoC) |
Max Charge Current (A) | 30 (10℃~35℃) |
Recommended Charge Current (A) | 6 - 10 |
Discharge Cut-off Voltage (V) | 8.8 |
Max Continuous Discharge Current (A) | 40 (10%~100% SOC) |
Cold Cranking Amps (CCA) | 300A |
External Short Circuit | Prohibition |
Operating Temperature Charge (℃) | 0 - 45℃ |
Operating Temperature Discharge (℃) | -40 - 60℃ |
Storage Temperature (℃) | -20 - 35℃ with 50% - 60% SOC |
Store Time @ Storage Temperature | 12 months |
Humidity (non-condensing) | 10% - 90% |
Battery Terminals | Bolt & nut |
Torque: 5 - 6 Nm | |
Battery Box Material | ABS + PC |
Ingress Protection (IP) | IP56 |
Cooling | Natural convection |
Battery Outer Dimensions (L x W x H) | 195 x 133 x 171 mm |
7.7 x 5.2 x 6.7 inch | |
Weight | 3.35 kg / 7.4 lb |
Mounting Position | Upright |
Fuse | Use appropriate fuse as close to battery positive (+) terminal as possible |
BMS Power Consumption | Max 0.2mA |
Application | Lawn tractor |
About DEFORD New Power Co., Ltd.
DEFORD New Power Co., Ltd. is committed to design and manufacture advanced, safe, and reliable battery systems for marine. We are veterans of battery industry, and our core team has nearly 20 years battery expertise.
Thanks to our deep understanding to battery technology, battery management system (BMS), and expertise on mechanics and thermodynamics. With the assistance of our advanced manufacturing facilities and cloud-based manufacturing execution system (MES). We do have the ability to guarantee the high quality, safety and reliability of your battery systems.
For any inquiries about lawn tractor batteries, please contact us by info@deford.com.cn.