Why rely on Li-Po batteries?

What are Li-Po batteries?

Li-Po batteries, also known as Li-Poly, are advanced power cells. They are the modern equivalent of lithium-ion (Li-Ion) batteries. They combine high performance with a flexible design based on gel or solid polymer electrolytes. As a result, the batteries are lighter, thinner and can take on almost any shape. This is why they are so popularly used in drones, smartphones, laptops, portable medical devices, emergency systems, remote-controlled toys and even in specialised military apparatus. Although they require certain usage rules to be followed regarding charging and storage, they are safe and durable when used properly.

Construction of lithium polymer batteries

Lithium-polymer batteries differ from standard lithium-ion cells primarily in the electrolyte used. In the case of Li-Po batteries, this is in the form of a gel or solid. This allows greater flexibility in the design of the cells so that they can take a variety of shapes and sizes.

Chemical composition of Li-Po batteries

Li-Po batteries are made up of several basic components, which are responsible for their performance, durability and safety of use. These are:

• Polymer electrolyte – this is most often in the form of a gel, allowing the transport of lithium ions between the electrodes. Its structure makes the battery lighter and more flexible compared to standard lithium-ion batteries with a liquid electrolyte.
• Cathode – usually made of materials such as lithium cobalt oxide (LiCoO₂). The choice of cathode material affects battery performance such as energy density, life cycle and thermal stability.
• Anode – usually constructed of graphite, which stores lithium ions during charging. During discharge, the lithium ions migrate from the anode to the cathode, releasing electrical energy.
• Separator – a thin polymer layer that prevents internal short circuits and allows lithium ions to flow between the electrodes. Separators reduce the risk of the battery overheating or igniting.

Key benefits of Li-Po technology

Lithium-polymer (Li-Po) batteries offer many advantages that make them indispensable in modern electronics. Learn about their key benefits and what to look out for to ensure their long life and safe use:

• High performance – longer working hours with less weight

One of the biggest advantages of Li-Po batteries is their high energy density. This means that they can store a large amount of energy while remaining compact and lightweight. This is a key feature for drones, remote-controlled RC cars or smartphones, where both performance and mobility are important. Li-Po batteries allow the device to run for longer without the need for frequent recharging, enhancing the user experience.

• Battery life – charge at any time without capacity drop

Unlike older battery technologies such as nickel-cadmium (Ni-Cd), Li-Po batteries have no memory effect. The lack of memory effect means that batteries can be recharged without being completely discharged before the next charge cycle. This not only increases the convenience of use, but also affects the longevity of the cell. Li-Po allows devices to be charged at any time without a drop in battery capacity.

• Shape flexibility – adapting dimensions to equipment requirements

Unlike Li-Ion cells, Li-Po batteries can be almost any shape and thickness. This allows them to easily fit into compact or non-standard device housings. This is a huge advantage for modern smartphones, laptops, smartwatches or miniature drones, where every millimetre of space is at a premium. The ability to form batteries into flat, thin structures gives designers of electronic devices more freedom to construct innovative technological solutions.

• Low self-discharge – long life at rest

Li-Po batteries also have a low self-discharge rate - they can be stored for long periods without significant loss of stored energy. Even if the device is not used for several months, the battery will hardly discharge. Li-Po is therefore ideal for applications requiring long storage.

Charging Li-Po batteries

Correct charging of Li-Po is an important issue for safe battery use. They require dedicated chargers that control voltage and current. Even the best quality cell can be damaged if not charged according to the manufacturer's recommendations. It is also worth remembering to follow the general charging rules for this type of battery to avoid the most common mistakes.

Principles of safe Li-Po charging:

• Using balancing chargers - ensure all cells are charged evenly.
• Monitoring the charging process - do not leave the battery unattended.
• Charging batteries away from flammable materials.
• Avoiding overcharging - voltage should not exceed 4.2 volts per cell to prevent damage to the battery.
• Ensuring adequate ventilation - minimises the risk of gas build-up.

Battery diagnostics – how to check batteries with a meter?

Regular diagnostics of the Li-Po battery helps to avoid damage and potential hazards. The state of charge of the Li-Po battery can be checked using a digital multimeter. The nominal voltage of the cells is:

• 1S (one cell): 3.7 V (full charge - 4.2 V)
• 2S: 7.4 V (full charge - 8.4 V)
• 3S: 11.1 V (full charge - 12.6 V)

A voltage drop below 3 volts per cell can mean permanent damage and a significant reduction in battery life.

Where to buy Li-Po batteries?

Choosing the right Li-Po battery is crucial to the performance and safety of your device. It is best to buy them from specialist electronics shops or sites offering high-quality power accessories. When purchasing, it is worth paying attention to:

• Voltage and number of cells - adapt to the requirements of the device.
• Capacity (mAh) - the higher, the longer the operating time.

In the Akyga® shop you will find a wide range of Li-Po batteries suitable for various applications - from RC modelling to advanced electronics. Check out our range and choose the perfect product for your needs!

Which Li-Po batteries to choose – which batteries are best?

Li-Po (lithium polymer) batteries are one of the best solutions for those looking for an efficient, lightweight and flexible energy source. When choosing a Li-Po battery, there are a few key factors to consider: capacity, voltage, discharge current and application. For remote-controlled devices such as drones, Li-Po batteries with a high discharge current will be best. For consumer electronics, batteries with higher capacity and stable voltage will be more suitable. To enjoy long and safe use, it is advisable to choose batteries from trusted manufacturers. In the Akyga shop, we offer Li-Po batteries from Akyga Battery, which are characterised by high quality, reliability and a wide range of applications. Invest in a battery tailored to your needs and enjoy trouble-free operation of your devices!