Upower Lithium Battery 12.8V/35Ah - UE-12Li35

Upower Lithium Battery 12.8V/35Ah - UE-12Li35

The Upower 12.8V/35Ah is a high quality, safe, efficient and durable lithium-ferrophosphate (LiFePO4) monobloc battery. It is designed to offer long life, superior energy efficiency and a very high level of safety compared to a traditional lead-acid battery, and lasts 10 times longer.

Its compact monobloc design, high energy density and integrated BMS (Battery Management System) provide complete protection against extreme charging and discharging conditions while maintaining constant power delivery.

In addition, the UE-12Li35 has a nominal voltage of 12.8 V and a usable capacity of 35 Ah.
Its LiFePO4 cells have several protective measures including high temperature thermal fuses, flame retardant additives and pressure relief valves.

Thanks to an optimal balance between capacity, size and performance, the Upower battery is perfect for photovoltaic installations, backup systems, telecommunications and autonomous mobility applications.
It is also ideal for portable equipment that requires a reliable and compact power source.

Upower 12.8V/35Ah Battery Key Features

LiFePO4 technology and superior performance

This battery uses LiFePO4 technology, which stands out for its thermal and chemical stability, high safety and long service life. This makes it much safer than traditional lead-acid batteries.
This technology is characterised by low internal resistance, which results in efficient and stable behaviour.

Its compact monoblock construction groups the cells together to deliver its 35 Ah capacity at 12.8 V in a stable and optimal manner, which equates to around 448 Wh of usable energy.
Thus, it provides constant and efficient power for medium-power devices and systems.

Their cubicles incorporate internal protections such as thermal fuses, flame retardant additive and pressure relief valves that reinforce their safety against overloads or extreme conditions.

The battery is designed to provide balanced and safe performance in both charging and discharging applications.
It also provides a stable and efficient discharge throughout its life cycle, maintaining consistent voltage and reducing energy losses.

In addition, Upower's LiFePO₄ battery has a high energy density that allows more energy to be stored in a compact size, providing reliable power every cycle of use.

Integrated BMS

The Upower battery incorporates an integrated Battery Management System (BMS) that monitors and protects the battery against conditions that may affect its performance or safety.

The BMS is responsible for protecting the battery against overcharging, over-discharging and overvoltage, and for balancing its cells to maximise service life.
It also prevents short circuits, overcurrents and extreme temperatures. In addition, it improves overall usage efficiency.

This type of built-in protection is essential to ensure safe operation and prolong the life of the battery, avoiding conditions that may damage the battery or reduce its efficiency, especially when the battery is used in demanding systems or is in frequent use.

In addition, the integrated BMS of this battery monitors the total voltage and temperature of the battery and of each individual cell.
It also monitors the state of charge (SOC), depth of discharge (DOD), state of health (SOH) and current in and out of the battery.

Thanks to this system, the battery operates within safe parameters without the need for additional maintenance.
This simplifies its use in domestic and professional installations.

Long service life and durability

LiFePO4 batteries are known for their long cycle life. In particular, the UE-12Li35 has up to 2,500 charge and discharge cycles at 100 % depth of discharge (DoD) without significant capacity degradation.
This means that they can withstand thousands of charge and discharge cycles without losing capacity.

Having a much longer life than most traditional lead-acid batteries, especially when the battery is used on a daily basis or with frequent discharges, resulting in a higher return on investment and fewer replacements over time.

In addition, its continuous energy efficiency and low internal resistance help to keep more energy available during each usage cycle.

Temperature range and ambient conditions

This Upower battery is designed to operate reliably over a wide temperature range, from 0 °C to 45 °C (charging) and from -20 °C to 60 °C (discharging).
Therefore, it can be used both indoors and in moderate outdoor environments.

This wide operating range, together with its robust and stable construction, makes the UE-12Li35 suitable for different climates and environmental conditions.

Design and construction

The Upower UE-12Li35 battery features a compact and lightweight monoblock format, i.e. all of its cells are grouped together in a single, robust, ready-to-install package.
This allows it to be used in confined spaces and makes it easy to install.

It also has compact dimensions and a light weight, making it an easy battery to handle.

Moreover, as it is a “sealed” and electronically managed battery, it does not require maintenance, special ventilation or periodic checks, which reduces maintenance costs and simplifies its integration into different systems.

This format makes it ideal for both stationary and mobile configurations, combining ease of installation and handling with high energy density.

Finally, it has M5 connection terminals, ensuring compatibility with almost any installation.

Scalability and enlargement

This battery can be connected in parallel or series with up to 4 units (4×4) of the same model, allowing the total capacity to be increased in parallel or the system voltage to be increased in series within the specified limits.

This makes the UE-12Li35 perfectly adaptable to more complex or higher power systems, thus expanding the possibilities of use according to the energy needs of each project.

Advantages of the Upower Lithium Battery 12.8V/35Ah - UE-12Li35

The UE-12Li35 has many advantages, including the following:

• Much longer service life: more than 2,500 cycles at 100 % DoD, extending system lifetime
• Safe operation with automatic internal detection and protection: stable LiFePO4 technology and BMS system with overload, over-discharge, short-circuit, over-voltage and over-temperature protections.
• Flat discharge curve: delivers constant power throughout the cycle, avoiding sudden voltage drops and ensuring longer autonomy.
• Fast and efficient charging: supports charging current up to 10 A (DC/VDC) with 14.6 V bulk voltage and 13.8-14 V float, improving recovery time.
• Higher energy density: offers more usable power (128 Wh total) in less space and weight (1.4 kg).
• Flexible modularity: configurable up to 4 in series and 4 in parallel (4×4), allowing voltage and capacity expansion.
• Maintenance and emission free: does not require special ventilation and does not generate gases.
• Lightweight and compact: facilitating installation and transport.
• Higher energy efficiency and lower self-discharge: reducing costs in the long term.
• Wide thermal range: enabling reliable operation in outdoor environments

These advantages make the Upower battery a modern, long-term economical and environmentally friendly solution, ideal for installations where reliability, efficiency and ease of use are required.

Upower 12,8V/35Ah Battery Applications and Uses

The Upower UE-12Li35 has a balance of size, power and reliability that makes it suitable for multiple uses:

• Small and medium-sized solar systems or surplus storage.
• Backup systems and UPS/EPS.
• Energy storage for households, businesses or industrial applications.
• Telecommunications and electronic/network equipment. 
• Light electric vehicles, caravans and auxiliary watercraft.
• Military applications.
• Low voltage systems in off-grid or stand-alone installations.
• Emergency and security lighting.
• Portable applications or auxiliary power.

Its compatibility with most chargers and inverters designed for 12 V makes it easy to integrate into existing installations without the need for additional dedicated hardware.
In addition, the design allows up to 4 units to be connected in parallel or in series, allowing both capacity (Ah) and total voltage to be increased to suit any system.

Upower Lithium Battery 12.8V/35Ah - UE-12Li35 Technical Information

Upower Lithium Battery 12,8V/35Ah technical sheet

Upower 12.8V/35Ah Lithium Battery Specification Sheet

Upower Lithium Battery 12.8V/35Ah Manual