Power Redefined
Engineered for reliability, efficiency, and sustainability in industrial applications.

Powering Progress: SAFEFlex Lithium Batteries
The SAFEFlex Lithium Batteries by Green Cubes are designed to redefine power in rugged environments, offering a harmonious blend of cost-effectiveness, efficiency, and durability. Tailored for the specific demands of industrial vehicles, these batteries ensure high cycle life and low maintenance, making the transition from lead acid to lithium technology seamless and beneficial.

High Cycle Life
Built to last, our batteries offer unparalleled cycle life for relentless operation.

Fast and Opportunity Charging
Swift charging meets operational efficiency, keeping you powered without pause.

Low Maintenance
Bid farewell to constant upkeep, embracing a future of minimal maintenance and maximized performance.
Lithium SAFEFlex MHE
Dynamic Durability & Intelligent Design
SAFEFlex elevates industrial power with a decade of innovation, delivering unmatched robustness and reliability. Features include modular design for enhanced serviceability, distributed BMS for precise cell monitoring, and advanced connectivity through WiFi, ensuring secure and efficient operations.
Customized Power for Precision Performance
Adaptability sits at the core of our SAFEFlex series, with Green Cubes’ custom BMS tailored to fit specific operational needs—whether for high-current applications, extreme cold storage, or fast opportunity charging. Our design offers both fully ballasted and non-ballasted options, catering to diverse industrial requirements without compromising on safety or efficiency.
Safety and Energy Efficiency Reimagined
Utilizing high-safety Lithium Iron Phosphate chemistry and continuous monitoring through our bespoke BMS, SAFEFlex batteries ensure peak protection. They’re constructed for ultimate peace of mind, with UL 2580 approvals and designed to significantly reduce operational costs through a high cycle life, low maintenance needs, and exceptional recharge efficiency.
SAFEFlex Plus
Enhanced Performance with SAFEFlex Plus
SAFEFlex Plus pushes the boundaries of industrial power, offering an advanced solution for high-demand applications. With increased energy density and enhanced cycle life, this series delivers superior performance in the most challenging environments. The Plus line features an optimized cell configuration, providing extended runtime and reduced charging frequency without compromising on the robust safety features that define the SAFEFlex brand.
Intelligent Adaptability for Diverse Needs
Building on the core SAFEFlex technology, the Plus series incorporates an enhanced BMS that adapts to varying load profiles in real-time. This intelligent system optimizes power delivery and battery longevity, making it ideal for operations with fluctuating energy demands. The Plus line maintains full compatibility with existing SAFEFlex charging infrastructure, ensuring a seamless upgrade path for evolving industrial requirements.
Eco-Friendly Power Meets Industrial Strength
SAFEFlex Plus embodies Green Cubes’ commitment to sustainable industrial solutions. With improved energy efficiency and an extended operational lifespan, this series significantly reduces the total cost of ownership while minimizing environmental impact. UL 2580 certified and built with premium Lithium Iron Phosphate cells, SAFEFlex Plus offers unparalleled safety and reliability for the most demanding industrial applications.
SAFEFlex MultiVoltage Series
Efficiency Redefined with Advanced Charging Technology
The SAFEFlex Multi Voltage series redefines industrial power solutions with its groundbreaking ability to charge at twice the voltage it discharges. This innovative design dramatically reduces charging time while maintaining constant power delivery, ensuring seamless performance across a range of equipment needs.
Faster Charging, Maximum Productivity
SAFEFlex Multi Voltage technology is engineered for industries where every second counts. By leveraging higher voltage charging, these batteries significantly cut downtime, enabling quicker turnaround without sacrificing power output. The advanced Battery Management System ensures optimal performance, delivering precise power while protecting both the battery and connected equipment.
Adaptable and Future-Ready
The Multi Voltage series meets the evolving demands of modern industries with unmatched versatility. Its ability to charge faster supports greater operational efficiency, allowing you to stay ahead in dynamic environments. Built with the same robust construction and safety features as the core SAFEFlex line, Multi Voltage batteries offer a future-ready solution, combining cutting-edge innovation with the reliability Green Cubes is known for.
SAFEFlex Standard
Model | Voltage | Lithium Capacity | Battery Weight | Battery Dimensions | Charge Port |
---|---|---|---|---|---|
FBP-1468 | 24V | 105 Ah | 330 lb | 24 x 6 x 22 in | no |
FBP-1407 | 24V | 105 Ah | 330 lb | 25.25 x 8.50 x 23 in | no |
FBP-1441 | 24V | 315 Ah | 1000 lb | 30.60 x 12.75 x 22.50 in | yes |
FBP-1403 | 24V | 420 Ah | 975 lb | 30.5 x 12.50 x 30.50 in | yes |
FBP-1423 | 36V | 630 Ah | 2250 lb | 38.25 x 24.50 x 22.50 in | yes |
FBP-1512 | 36V | 525 Ah | 1900 lb | 38.5 x 21 x 22.50 in | yes |
FBP-1328 | 36V | 525 Ah | 1850 lb | 37.75 x 13.25 x 30.50 in | yes |
FBP-1413 | 36V | 630 Ah | 2300 lb | 38 x 17.75 x 30.50 in | yes |
FBP-1414 | 36V | 735 Ah | 2600 lb | 38.25 x 20 x 30.50 in | yes |
FBP-1486 | 48V | 420 Ah | 1850 lb | 34 x 26 x 22.50 in | no |
FBP-1490 | 48V | 525 Ah | 2300 lb | 38.50 x 27 x 22.50 in | yes |
FBP-1419 | 48V | 630 Ah | 3000 lb | 38.25 x 32.25 x 20.50 in | yes |
FBP-1443 | 48V | 735 Ah | 3100 lb | 38.25 x 32.25 x 22.50 in | yes |
FBP-1432 | 80V | 525 Ah | 3400 lb | 38.75 x 36 x 22.50 in | yes |
FBP-1481 | 80V | 420 Ah | 3100 lb | 36.08 x 38.58 x 21.50 in | yes |
FBP-1492 | 80V | 630 Ah | 4600 lb | 40.5 x 39 x 31 in | yes |
FBP-1421 | 80V | 735 Ah | 4600 lb | 44 x 39.75 x 28 in | yes |
SAFEFlex Plus
Chemistry | Lithium Iron Phosphate | |||
Cycle Life | 4000 Cycles | |||
Voltage Class | 24V | 36V | 48V | 80V |
Nominal Capacity | 420 – 630 Ah 11 – 16 kWh | 525 – 945 Ah 20 – 36 kWh | 525 – 840 Ah 26 – 43 kWh | 315 – 735 Ah 26 – 61 kWh |
Nominal Voltage | 25.6 V | 38.4 V | 51.2 V | 83.2 V |
Operating Voltage | 24 – 28.8 V | 36 – 43.2 V | 48 – 57.6 V | 78 – 93.6 V |
Discharge Current continuous (max RMS incl. peaks) | SB 175 connector: 250 A All other connector options: 320 A | 320 A | 315Ah: 300 A >=420Ah: 320 A | |
Discharge Current peak (max) | 600 A | 1200 A | 1200 A / 800 A | |
Charge Current continuous (max RMS) | 320 A | 315Ah: 240 A >=420Ah: 320 A | ||
Tray Material | Powder coated steel | |||
Operating Temperature (with heater) | -4 to +129°F -20 to +54°C | -4 to 131°F -20 to +55°C | -4 to 122°F -20 to +50°C | -4 to 127°F -20 to +53°C |
Operating Temperature (without heater) | 32 to 129°F 0 to +54°C | 32 to 131°F 0 to +55°C | 32 to 122°F 0 to +50°C | 32 to 127°F 0 to +53°C |
Storage Temperature | 32 to +95°F (0 to +35°C) | |||
Storage Humidity | ≤ 70% RH | |||
Ingress Protection | IP 2X | |||
Battery Modes | Active (Charging, Discharging, Idle) Disabled (Sleeping, Ship/Storage) | |||
Cycle Life | CANBus, USB, Wi-Fi Separate CAN Bus for Truck and Charger All interfaces are isolated | |||
Charger | Multiple charger protocols supported | |||
Vehicle | Multiple vehicle protocols supported | |||
Short circuit protection | Yes – recoverable without service intervention | |||
Functional Safety Certified Protections | Cell Over- and Undervoltage Protection Cell Over- and Undertemperature Protection Module Overcurrent Protection Module Overvoltage Protection | Cell Over- and Undervoltage Protection Cell Over- and Undertemperature Protection Module Overcurrent Protection Module Overvoltage Protection Manual Service Disconnect | ||
Agency Approvals | UL 2580:2020 (MH66684) ISO 13849-1:2023 / 13849-2:2012 (MH66684) UN 38.3 Revision 7 Type EE |
Model | Voltage | Lithium Capacity | Battery Weight | Battery Dimensions LxWxH inches |
---|---|---|---|---|
FBP2-048-005-01 | 51.2 V | 525 | 2,300 LBS | 38.25 x 24.44 x 22.5 |
FBP2-048-008-02 | 51.2 V | 840 | 3,500 LBS | 39 x 38.5 x 22.18 |
FBP2-048-007-03 | 51.2 V | 735 | 3,300 LBS | 38.25 x 32.25 x 22.5 |
FBP2-048-007-04 | 51.2 V | 735 | 4,100 LBS | 39 x 39.25 x 22.5 |
FBP2-048-006-05 | 51.2 V | 630 | 2,800 LBS | 38 x 30.32 x 22.5 |
FBP2-048-007-06 | 51.2 V | 735 | 4,000 LBS | 45 x 45 x 22.5 |
FBP2-036-007-07 | 38.4 V | 735 | 2,600 LBS | 38.25 x 20 x 29 |
FBP2-036-006-08 | 38.4 V | 630 | 2,500 LBS | C |
FBP2-036-008-07 | 51.2 V | 840 | 2,600 LBS | 38.25 x 20 x 29 |
FBP2-036-006-08 | 51.2 V | 630 | 2,500 LBS | 38 x 17.75 x 28 |
FBP2-036-006-08 | 51.2 V | 630 | 2,500 LBS | 38 x 17.75 x 28 |
FBP2-036-007-07 | 51.2 V | 735 | 2,800 LBS | 38.25 x 20 x 29 |
FBP2-036-008-09 | 51.2 V | 840 | 3,000 LBS | 38.25 x 22.5 x 22.5 |
FBP2-036-006-10 | 51.2 V | 630 | 2,250 LBS | 38.25 x 24.5 x 22.5 |
SAFEFlex PLUS
Datasheets 08/2025MHE
Datasheets 08/2025FBP-1000
Datasheets 08/2025Materials Handling Solutions
Brochures 08/2025SAFEFlex Safety Brief
Manuals 08/2025SAFEFlex Quick Start Guide
Manuals 08/2025SAFEFlex Efficiency Brief
Datasheets 08/2025Cold Storage Best Practices
Datasheets 08/2025Related Products
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Choosing Green Cubes for
Industrial Lithium Batteries and Chargers
Green Cubes industrial lithium batteries and chargers are designed not just to power your operations but to do so in a way that significantly reduces your carbon footprint, slashes operational costs, and enhances overall efficiency. With each industry we serve, we ensure that our technology is perfectly aligned with the specific challenges and needs of your equipment.






Customer Ratings and Reviews
Green Cubes is a great company, great engineers, great product. That’s been kind of my number one go to [lithium] battery.
President Industrial Power Company
The thing I like about Green Cubes is that they have other lines of business outside of material handling batteries, they have been in the lithium world for a long time. I can trust they will likely stay in business
VP Industrial Battery Company
Green Cubes [differentiates] on its capability to custom design for things like the hardware, the firmware, and inverters. They also have economies of scale because they make battery systems for things like forklifts.
VP Powered Cart OEM
I am doing some work with them right now. We’re learning their products, and looking at demos. They have good people. They seem like they know the technology well – they say they’re a technology company. I like that they’ve been in the lithium business a long time. I can trust they will likely stay in business.
Sales Manager Industrial Battery Company
Green Cubes Technology would be my go-to for lithium applications.
Branch Manager OEM
I’ve told my friends at Green Cubes, I don’t plan on going anywhere. I believe in loyalty.