Make your battery happy!

The lithium-ion traction battery in your car is not so demanding, but there are a few things you should keep in mind so that it remains efficient for a long time.


How the lithium-ion
battery works.

Through a chemical process involving the altering of substances, electric energy is generated in lithium-ion batteries and stored in lithium atoms. They have a high specific energy, which makes them attractive for intensive applications such as in the traction batteries of electric and hybrid cars.


Lithium-ion Battery Basics


No memory effect

Compared to previous generations of batteries, Li-ion batteries have no relevant memory effect, i.e. they do not lose capacity when they are fully charged, even with frequent partial discharge. A complete discharge as with nickel-cadmium batteries is not required.

Long lifespan

With current Li-ion batteries, the service life is less dependent on actual age than on the number of charging and discharging cycles. The battery remains efficient for the longest if it is both charged and discharged at room temperature with low currents. In general, the lower the burden on the battery when charging and discharging, the slower the aging of the battery. Under good circumstances, a battery can maintain a condition of over 80 percent of its original capacity after 1000 charging cycles.

Energy density and efficiency

The energy density of a lithium-ion battery is more than twice as high as that of a comparable nickel-cadmium battery, which are used in everyday life in numerous devices in the form of AA or AAA batteries. The efficiency of a battery describes the relationship between the energy supplied (charge) and the usable energy (discharge). This ratio, known as the Coulombic efficiency, is almost 100 percent for Li-ion batteries and means that there is hardly any charge loss when charging the battery.

Cell phone batteries and electric vehicle batteries – a comparison

  • 0 to 100% usable energy- no buffer available
  • 24 hours per day
  • Durability: approximately 1.5 years
  • Operating time: 13140 h
  • Charging cycles: 500
  • Manufacturing cost: around 20 Euros
  • 90% usable energy, 10% buffer available
  • 1 hour drive mode per day
  • Durability > 10 years
  • Mileage performance> 300.000km
  • from 1000 (Tesla) up to 2500 (i3, eGolf 1.Gen) battery cycles possible
  • Exchange costs up to15000 Euros
How to Video

Take care
of your Battery!

The high voltage battery of your electric car ages not only through time - factors such as temeperature and your driving style impact the state of health as well.

Keep your battery in good shape!


Inspection makes
the master

Regular maintenance of the battery during service is a good start. An objective test of the battery health after 2 years or 100,000 KM provides clarity: is my battery still capable of maximum performance and does it keep up with what the manufacturer promises? With the AVILOO battery test, in just 24 hours you will receive an independent and valuable assessment of how well the battery of your electric car or hybrid car performs and whether it remains in good condition. In cases of doubt, our certificate gives you a clear result for a discussion with the manufacturer.

Get your AVILOO battery certificate now for more clarity about the condition of your battery!

Advantages of the AVILOO Batterytest

  • Absolute certainty about the usable energy of a battery
  • Clarity about the health of the individual cells of the battery
  • Independent AVILOO test certificate for your tested car

Long live
your battery!

Driving until empty and then fully charging again at an electric outlet, like with a cell phone battery – it’s that simple with an electric car too, but this stresses the traction battery. You can find out how to save your battery here:


Charging correctly makes the difference!


One full charge please?

Better not! If you always fully charge your electric car, you will reduce the performance and therefore the service life of the traction battery over time. Charge only up to approximately 80% charge level, which saves the battery – and if you need the entire range of your electric car, do not charge days before the planned long journey, but just before it. A practical tip is to use a charging timer (located in your manufacturer’s app), which charges the car in good time but gently for the required distance of an upcoming trip.

Avoid a dead battery:

Make sure that the battery does not run completely dry down to the last couple of kilometers. If possible, the charge level should not fall below 20%, as this also leads to faster aging. The comfort zone is between 20 and 80% charge level.

The household electric outlet is your friend.

The quick charging stations with 50kw or Tesla superchargers with over 100kw of power ensures quick charging and short breaks on longer journeys. However, this type of charging stresses your battery (higher cell temperature and high charging current), so always try to charge as slowly as possible – for example, charge your battery at a household electric outlet.

Summer, sun? Stay cool!

During the warmer seasons of the year, driving your electric car can be particularly relaxing – cruising quietly on country roads to go for a day trip to the water. The electric battery, however, likes it cool, so it’s best to park your car in the shade or, if possible, in the underground parking garage – then the battery temperature remains within a comfortable range for a long service life.

Dress warmly in the cold!

If you have garage space, you should absolutely park your electric car inside during winter, where it is a bit warmer. Batteries prefer to charge when the temperature is above 0° C, preferably at 20° C .  It is therefore advisable to park your car in an underground parking garage during winter, where it is usually well above 0° C. During winter it is best to charge immediately after a trip, because then the battery is still warm and the charging process is gentler than when it is cold.

Energy-saving driving for professionals!

In addition to correct charging, you can extend the life of your electric vehicle battery with an adapted and moderate driving style, and thus go through life even more relaxed:

Watch the time!

Plan your trips with a little extra spare time, so that you don’t have to rush both yourself and your electric car. In any case, make sure you include ample time into your travel schedule, and you take breaks at the charging stations on longer routes.


Respect the other road users and do not drive too close or overtake others at every opportunity. During a merge or a narrowing of the lanes, allow other drivers to merge before you, and avoid jerky driving movements. This not only leads to a more relaxed drive friendlier gestures from other road users, it also saves the battery and tires of your electric car.

Less is often more (range!)

All additional appliances and devices that use electricity drain your battery further. Headlights, windshield wipers, or radio and music players are not that important, but air conditioning or heating requires significantly more energy. Check again and again which devices are connected and which of them you actually need. If a seat or steering wheel has integrated heating, use it more than the interior heater, which has to warm up the whole car interior. Also, keep an eye on the current energy consumption of the engine on the dashboard display, so that you get to know the effects of your driving maneuvers on your car’s battery. A heated seat on maximum setting requires approximately 50 to 100W, while the air heating on maximum setting requires approximately 4000 to 8000W of power.