How to store and maintain your e-bike battery during winter
During winter, cold temperatures, moisture and long periods of inactivity can put your e-bike battery under considerable stress. Although lithium-ion batteries are designed to operate in a wide range of conditions, they remain sensitive to extreme temperatures, especially cold weather.
Should you remove the battery if your bike is stored in the garage? Can you recharge it immediately after riding in cold weather? What charge level should you maintain during winter storage? In this article, you'll discover a few simple tips to help you look after your e-bike battery throughout the winter months.
Key takeaways:
Store your battery away from freezing temperatures in a dry, temperate place, and remove it from the bike if it will not be used for an extended period.
Recharge your battery at least once a month, even if the bike is not being used. During storage, maintain a charge level between 40% and 70%.
Cold weather temporarily reduces battery range and power, but normal performance returns once temperatures rise.
Avoid charging a cold battery immediately after a winter ride. Allow it to return to room temperature before plugging it in.
It's important to store your electric bike battery in optimum conditions.
The battery is an essential part of your electric bike. And the proof is in the pricing : on average, the battery accounts for a third of the total price of a new electric bike... That's why it's essential to take great care of it, whether you're charging it, using it or storing it! As a relatively fragile product, lithium electric bike batteries are also sensitive to temperature variations (hot and cold).
Tip 1: To prolong the life of your electric battery, store it at room temperature, between 15°C and 30°C. According to the manufacturers, the ideal temperature is 15°C. Beware of the cold in winter: your battery doesn't take it well, and can lose up to 40% of its basic capacity as a result. For optimum storage, remove the battery from your electric bike and store it in a dry place, such as an indoor cupboard.
For optimal storage, should you remove the battery from your bike? The answer is yes: it is better to remove your electric bike battery and place it in a dry place, such as an indoor cupboard.
If you notice a loss of autonomy, you can opt to have your battery reconditioned by Doctibike. It's cheaper than buying a new battery and it's environmentally friendly, so you can give your battery a second life, just as it had in the early days. Reconditioning times are much shorter in winter.
I want to recondition my electric bike battery
Tip 2: If you use your electric bike in winter and want to recharge your battery directly after use in cold weather, we recommend that you wait about half an hour before recharging: this prevents the battery from suffering a thermal shock. Batteries don't take kindly to this!
It's important to charge your battery regularly, even if you're not using your bike.
Not using your electric bike for a long time? Then it's vital to recharge the battery regularly! Most Lithium-Ion batteries cannot withstand being completely discharged: this phenomenon, known as "deep discharge", irreversibly damages the energy cells contained in your battery. Once this stage has been reached, you will have to recondition your battery (in other words, replace all the energy cells in your battery) or buy a new battery, at a high price.
Tip 3: During the winter, or during any period of inactivity, know when to recharge your bike battery: we recommend doing it at least once a month. This considerably reduces the risk of deep discharge of your battery! Also remember to keep the charge level of your electric battery between 40% and 70% of its capacity when not in use. That way, there's no risk of your battery refusing to charge in the spring and your electric bike becoming unusable.
Tip 4: When you connect your battery to recharge it, make sure you connect it in the right order: first connect the charger to the battery, then to the wall socket. This avoids the phenomenon of electric arcing, which can be very harmful to batteries! The ideal solution, of course, is to remove the battery from the bike and take it with you indoors: at home or in the office.
How does cold weather affect your e-bike battery?
Before heading out for a ride in cold weather, it's worth understanding how low temperatures affect your battery.
When temperatures drop, your e-bike battery's performance may be temporarily reduced. Contrary to popular belief, cold weather does not damage the battery itself. Instead, it slows down the chemical reactions that generate electrical energy. As a result, your e-bike battery's range may decrease noticeably during winter rides.
This reduction in performance is only temporary. Once the battery warms up again, it returns to its normal operating capacity. This means you may travel fewer miles or kilometres on a full charge during winter without your battery being damaged.
Cold temperatures can also cause the battery voltage to drop more quickly when high levels of motor assistance are required. In some situations, the battery management system limits the amount of power delivered in order to protect the battery cells. As a result, you may notice less responsive motor assistance, particularly when starting, accelerating or climbing hills.
Occasional use of your e-bike in cold weather generally has no lasting effect on the battery. However, charging a battery while it is still extremely cold can accelerate battery ageing and reduce its overall lifespan. For this reason, it is recommended to allow the battery to return to room temperature before recharging it.
What to do when Spring arrives?
Has your electric bike been out of action for a long time? Before getting on board your trusty electric steed, recharge the battery to 100% and test the various components of your electric bike, such as the brakes, tyre pressure, transmission, etc.
When you take your electric bike out again, if you don't follow the battery conservation steps, you may notice a loss of range. If this is the case, call a Doctibike expert on +33 (0)9 67 04 31 33, who will be able to find a rapid solution for you by diagnosing your electric battery.
