If you decide to convert your regular bike to an electric bike with a hub motor, you will need to choose the right type of battery. Depending on your needs and budget, there are several options for you to consider.
The first is the most popular lithium battery. Lithium batteries have the characteristics of being light and compact. For most hub motor electric bikes, a lithium battery with a 10 to 15 amp-hour capacity in the 24 to 48-volt range is the ideal choice. This will give you a driving range of 20 to 50 miles per charge, but the exact range depends on the terrain. Lithium batteries do require an electronic controller to properly charge and discharge. But complete e-bike lithium battery kits are easy to find and install.
For those who want to achieve maximum range on a single charge, nickel-metal hydride (NiMH) batteries are a good choice. NiMH batteries tend to be larger and heavier than lithium-ion batteries, but they can provide up to twice the range. However, even when not in use, NiMH batteries lose capacity over time. and they take a long time to fully charge.
The final option to consider is an internal hub motor with an integrated battery, which is often referred to as an "integrated hub motor." One-piece hub motors have a very clean design and do not require an additional external battery pack. However, the range may be limited compared to a separate lithium e-bike battery, and replacement packs can be expensive.
In short, for a DIY e-bike hub motor project, a high-quality lithium-ion battery may be your best choice. Combine the right lithium battery with an efficient brushless hub motor, and you have an electric bike that will provide a great riding experience for years to come.
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