The silver fish battery form factor provides a smaller set of options compared to other battery styles. To be used with a silver fish mounting system, a new battery must be designed to attach to a mounting rail, provide the same pin-out configuration as the original battery, and physically match the dimensions of the original battery. The Xunyunda 48V 16Ah Silver Fish battery provides 768 watt-hours in the silver fish form factor and includes an anti-theft lock and LED charge indicators.
With a 16Ah and 48V battery, you can expect 768Wh of capacity. This is sufficient for most commuting and recreational riding requirements and does not reach into the territory of large and heavy packs available at 20Ah and above capacities.
Specs Overview
The BMS 25A rating at 48V supports motors to about 1200W of continuous output. The motor support ratings are listed as being between 200W and 750W, covering the majority of motor sizes that are typically utilized in silver fish format bikes (typically 250W to 500W hub motors). The BMS headroom is sufficient for the target application.
Charging speed
Using the provided 2A charger, it will take approximately 8 hours to completely recharge a 16Ah battery from empty. While this is suitable for overnight charging, if you require mid-day top-offs, it may be slower than desired. Use of a compatible 4A charger will reduce the charging time to about 4 hours when needed.
Silver fish form factor specifics
Batteries in the silver fish format are generally long and narrow with a rounded cross-section and a mounting rail along the bottom. Batteries in the silver fish format are distinctively shaped from both the shark/hailong format (angular-shaped with a mounting rail on the side) and the downtube format (mounting internal to the frame). When purchasing an alternative to an existing silver fish battery, measure the length and width of your original battery and the connector pin arrangement and ensure that the mounting rail dimension of the replacement battery matches that of the original battery. Since manufacturers produce silver fish format batteries of varying lengths, it is essential to confirm the dimensions of the battery in the current listing.
Anti-Theft Lock and LED Features
The anti-theft lock is an important feature that improves the user experience. It allows you to leave your bike secured to a rack without having to remove the battery to go with you. The ability to secure the battery to the frame mount eliminates the possibility of a thief quickly removing the battery from the mount and taking your entire bike. The anti-theft lock prevents the battery from sliding off the rail unless the key is inserted into the lock cylinder.
The LED indicator provides a convenient visual representation of the battery charge level. It provides an instant indication of whether there is enough charge remaining in the battery to allow you to complete your ride. It is a minor feature, but it is something that you will consistently use and appreciate.
Range at 768Wh
Based on typical commuter usage patterns, you can expect to achieve a range of 25 to 40 miles per charge cycle with 768Wh. Lighter riders utilizing the least amount of assistance (PAS Mode 2-3) may achieve the upper end of the range. Riders using higher levels of assistance or carrying additional weight will likely achieve the lower end of the range.
For reference purposes, this capacity places in the middle of the battery comparison table among other silver fish and compact format batteries. It provides significantly more capacity than the 480 to 576Wh achieved by 10-12Ah packs, and it does not involve the added bulk and weight of the larger 20Ah and above capacity options. Therefore, for most city and urban commutes, 768Wh provides ample capacity with plenty of reserve to account for variable conditions.
What Buyers Are Saying
As of today, this is a new listing, and therefore, there are no buyer reviews available. Thus, buyers should rely on the specifications and the manufacturer's past history of producing other silver fish format batteries that have garnered positive reviews regarding fitment and performance. Buyer reviews for this particular model are still building, and therefore, it is essential to review the current Amazon listing for updates on the status of buyer reviews.
Check the current listing on Amazon to see if reviews have accumulated since this was written.
Who Should Buy This
You should consider the Xunyunda 48V 16Ah Silver Fish battery if your bike utilizes a silver fish format mounting system and you require 48V of nominal voltage at a 15 to 16Ah capacity. The anti-theft lock and LED indicators enhance the usability of the battery and its integration into your cycling routine.
If you are unsure if your bike utilizes a silver fish format, examine the shape of your existing battery (if applicable) or the mounting bracket on your frame. Silver fish batteries are easily identified due to their unique rounded oval cross-section and bottom-mounted rail. If your bike utilizes a different format, use the battery comparison table to filter by voltage and format to determine your options. Browse 48V silver fish ebike batteries on Amazon to compare your options, and view the ebike battery reviews section for more information and comparisons across formats.
Frequently Asked Questions
How do I know if my bike is compatible with a silver fish battery? Your bike accepts a silver fish battery if your existing battery or the mounting bracket on your frame utilizes a rounded oval cross-section and a bottom-mounted rail. In addition to verifying the rail design, ensure that the length, width, and connector pin arrangement of your existing battery matches that of the Xunyunda 48V 16Ah Silver Fish battery prior to making a purchase. If you plan to add a battery mount to a bike that previously did not possess one, you will also need to acquire a compatible mounting bracket for the silver fish rail system.
Is the anti-theft lock secure enough for daily use? The anti-theft lock will prevent casual removal of the battery from the rail. It does not serve as a substitute for securing the entire bike. The anti-theft lock cylinder functions similarly to the standard ebike battery locks found in the price range of this product.
What charger speed is recommended for daily commuters? The included 2A charger will take approximately 8 hours to fully charge the 16Ah battery from empty. While this is acceptable for overnight charging, if you desire to perform a mid-day top-off, you will want to utilize a 4A charger, which will take approximately 4 hours to complete the charge cycle. Prior to using a replacement charger, verify that it is rated for the required 48V termination voltage.
Can this replace a silver fish battery from a different brand? It is possible, but it depends upon matching the connector pin arrangement and count, the physical dimensions (especially length), and the mounting rail dimensions. All manufacturers are not perfectly compliant with the silver fish format specification. Ensure that you carefully measure your original battery prior to placing an order.
What happens if the battery runs low mid-ride? The BMS will shut down power to the motor to protect the battery cells before they become discharged below safe levels. Most riders observe a significant decrease in power delivery prior to the complete shutdown of the motor. The LED indicator permits you to visually assess the charge level of the battery prior to departure, thereby reducing the likelihood of experiencing an unplanned shutdown.
Does the 2A charger included work on US power outlets? Verify the charger specifications contained in the current listing for voltage and plug configuration. Most chargers that are shipped with Amazon-sold ebike batteries contain US-compatible plugs or adapters. Verify the charger configuration prior to assuming it operates correctly with your US-based outlet.