Battery Case Examples
Reention Dorado ID21700
The ID21700 is a very popular case that can replace many of the older, smaller versions (shown below) while offering much higher capacity because it uses 21700 cells instead of 18650 cells.
This case is slightly larger than the older cases so it’s important to make sure it will fit your bike frame first before you purchase one.
There are also different charge and discharge ports available for this style. Some examples are shown below but feel free to reach out if you need help determining what’s right for your bike. Available in 36-60 volt versions
Hailong Cases
Hailong cases are very popular and they are available in a variety of sizes. They all have locking base plates they slide into and are a solid choice for most bikes. From left to right you see 65 cell, 70 cell and 56 cell cases. The 65 cell shown here will also accommodate a built in USB port for onboard charging for cell phones and other devices.
Silverfish Cases
“Silverfish” battery cases are another popular style commonly found on smaller folding e-bikes. These cases are mounted vertically behind the seat and slide in place on a rail. Due to their large size they can be built with many cells and thus provide very long range. These batteries are commonly built with 36 and 48 volt systems.
Specialty Cases
Odd placement choices or small bike frames are examples of why a unique battery case may be needed. Shown on the right is a Hailong Side Release battery case perfect for many bikes that cannot accommodate typical battery cases.
Reention Cases
Reention battery cases are manufactured with a semi flush mounting style and have become very popular in recent years. They are commonly used on hybrid and mountain bikes and are now available in extra large capacity housings. This brand of case is widely used on many modern factory e-bikes with specially cut frames made for an exact fit. They typically also have built in USB charging ports.
Big Polly
“Big Polly” is all about size. This massive case can hold up to (91) 18650 cells. A 48 volt setup with this case could provide you up to 24.5 amp hours. If using it in a 36 volt configuration you could have a whopping 31.5 amp hours for extreme range.
Several newer versions of this case are now available and are made to use 21700 cells which can greatly increase overall capacity. Keep in mind there are different mounting base styles so it’s important to double check what you have. Also be sure to note the type of charger port on your existing battery so it can be matched.
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