What are the benefits of lithium batteries


Li-ion batteries have revolutionized the world of rechargeable batteries. The current generation of rechargeable batteries impresses with a non-existent memory effect, long runtimes and fast charging intervals. The performance of the devices is also absolutely impressive, which is hardly behind the gasoline engines.

What are Li-ion batteries?

In the past, batteries were made exclusively from nickel-cadmium. It was only around 25 years ago that nickel metal hydride and lithium ions were discovered as suitable materials. The Li-ion battery has proven to be particularly effective and is by far the most frequently installed today. Lithium is extremely light and has a particularly high energy density.

Disadvantages of Li-ion batteries

Li-ion batteries are sensitive to deep discharge but also to overvoltage. The battery also proves to be sensitive to the effects of sun and heat, but also to the cold. For the garden tools this means that the robotic lawnmower z. B. should not be used in the blazing midday sun and ideally stored in a frost-free shed in winter. If the battery is not used, it ages quickly.

Advantages of the Li-ion batteries

The clearest advantage is probably the high energy density, which is around twice as high as that of a Ni-Cd battery, and the trend is rising. The high voltage is enough to operate various devices.

Li-ion batteries are known not least because there is no memory effect. While NiCd batteries remember frequent partial discharges and the battery “thinks” that it needs less energy the next time it is charged, the service life of Li-ion batteries is even increased through partial charges. So you don't have to pay attention to how full or empty the battery is before you reconnect it to the mains.

It should also be mentioned that the batteries hardly discharge themselves. If you store garden tools z. For example, in the basement over winter, self-discharge is around 2%, which is further reduced at cool temperatures.

Li-ion batteries have a long shelf life. The service life is measured here in the number of charging cycles and, depending on the type of battery, can usually be 800-2,000 cycles. The service life of the batteries can of course be influenced by appropriate handling. Cool storage and recharging at 50% can double the number of cycles.

Another advantage of gardening tools is that a single battery is directly compatible with a complete series, meaning that only one battery is required to operate multiple tools. Conversely, the operating times are sometimes extended by a replaceable battery so that uninterrupted work is possible.

What is the difference to lithium polymer batteries?

Lithium polymer batteries are a further development of the Li-ion batteries, i. H. one does not exclude the other, especially since there are a large number of different types in terms of chemical structure such as the Li-cobalt dioxide, manganese dioxide, iron phosphate or titanate battery, which operate under the generic term Li-ion battery. They have a higher capacity with a compact design at the same time, which makes them particularly interesting for use in mobile devices.

However, these batteries are sensitive to deep discharge, so that charging circuits are associated with a relatively high level of effort. They are not suitable for use in negative areas and the batteries are otherwise sensitive to an excessive discharge current, which in the worst case can even cause a fire.


Li-ion batteries are currently the ideal solution for garden tools that require long running times and high performance. Thanks to quick chargers, some batteries can even be operated non-stop, so that they are by no means at a disadvantage compared to gasoline-powered vehicles in terms of flexibility. Instead, the quiet operation of the cordless tools, the low maintenance intensity and, above all, the environmentally friendly operation, which is particularly given when charging with green electricity, are convincing. Finally, due to their low weight, the devices are also suitable for fatigue-free gardening, and the excellent handling is impressive. The only drawback that permanently affects the battery is its sensitivity to extreme temperatures. This, too, is easy to act with a little wise foresight, so that you can enjoy the device for a long time.