How to choose the battery for your electric bicycle kit

As you can see, a Lithium battery comes at a high price.

The price of a Lithium battery depends on the one hand on the quality of the cells and the BMS that compose it but also on its capacity and its voltage.

For equal cell quality, the price of the battery will be proportional to the capacity: a 15Ah battery will cost around 50% more than a 10Ah battery.

The more the voltage increases, the more the number of components of the battery increases. A 48V 10Ah battery will therefore be more expensive than a 36V 10Ah battery.

You must therefore clearly identify your needs in terms of power (choice of cell quality), top speed (choice of voltage) and autonomy (choice of capacity).

All OZO batteries are assembled with the most premium cells from leading brands such as Samsung and Panasonic, which will allow you to have optimum performance and maximum lifespan.

Watch out for some attractive prices found on the Internet, as there are a lot of poor quality or counterfeit cells that will give you a lot of problems in the long run: risk of fire, reduced lifespan, poor performance.

If you choose a 250W or 500W motor kit, you will need a 36V battery.

For kits with a power greater than 750W you will need to choose a 48V battery.

The range you get on the handlebars of your bike will depend directly on the battery capacity (in Ah). A 15Ah battery will give you 50% more autonomy than a 10Ah battery at equal voltage.

To compare the energy available in two batteries with a different voltage, you will need to compare the Wh, that is, the product of the voltage and the capacity. For example a 36V 10Ah battery offers 360Wh of energy (36x10) while a 48V 10Ah battery offers 480Wh of energy (48x10).

By using these two batteries on the same motor kit, the 48V 10Ah battery will give you 33% more autonomy than the 36V 10Ah (480/360) battery.

So you will understand, the greater the capacity in Ah, the greater the energy in Wh and the greater the autonomy.

In order to estimate the potential autonomy that you will obtain with a particular battery, whatever the model of electric bike kit chosen, you can take as a reference calculation, an energy consumption of 10Wh / km. On this basis, a 48V 10Ah (480Wh) battery will offer you a theoretical autonomy of 48Km and a 36V 10Ah (360Wh) battery a theoretical autonomy of 36Km.

Note that this consumption value of 10Wh / km constitutes an average of the consumption recorded by our customers over 10 years on all types of routes, bikes and profiles, but this value remains purely indicative.

Pour aller plus loin sur le sujet, nous vous invitons à lire l’article de blog suivant :Estimation de l'autonomie de votre kit électrique pour vélo

To go further on the subject, we invite you to read the following blog article : Estimating the autonomy of your electric bicycle kit

We offer batteries in different shapes to fit all bicycle frames.

Note that we offer batteries with or without fairing.

The fairing has a function of protection against impacts and bad weather and also allows the battery to be locked to the bike with a key.

Batteries without shrouds are called "PVC batteries" because the cells are simply wrapped in a PVC sheath. PVC batteries are therefore not protected from shocks and bad weather and it will be necessary to install them in a waterproof bag. OZO has developed various saddlebags to facilitate the installation and transport of these batteries.

• If your need for autonomy is of the order of 30 km, the gourd battery can be installed on all types of bikes since it fits in a traditional bottle holder.
• If your frame has sufficient space, you can install These batteries provide good weight distribution on the bike since they sit in the middle of the frame.
• If you want to make the battery invisible, you can opt for PVC batteries. You can thus install them in a bag under the saddle, or in the frame, or on a luggage rack.
• For enduro or freeride mountain biking, we recommend that you take a frame battery (if the rear shock absorber is not in the middle of the frame) and secure it with the threaded adapters and the retaining strap.
• However, for the most demanding practices (DH), we advise you to position your battery in an EVOC backpack equipped with CE approved back protector. This solution will allow you not to damage your battery on a possible fall, not to stress it in vibration and to keep a light and manoeuvrable bike.