The Xiseny 48V 13Ah is a 624Wh silver fish style ebike battery that fits a number of folding and compact ebikes such as NARRAK, APYEAR, EBKAROCY, MiFa, Rex, Prophete, and some European brands. The Xiseny battery package contains a 2A charger, a key lock, and an LED power indicator on the battery housing. The 30A BMS protects against overcharge, over-discharge, overcurrent, and short circuit, and Xiseny indicates the cells will retain over 78% capacity after 1000 cycles. At 624Wh, this is a solid amount of capacity for a silver fish pack, offering riders more range than many of the smaller folding ebike batteries currently available.
As a replacement silver fish battery for a folding or compact ebike, the Xiseny 48V 13Ah is a viable option. The listing mentions compatibility with motors in the 250W to 1000W range, and the 30A continuous BMS should support that entire range without losing power. The aluminum housing provides a more durable feel than competing plastic-housed products, and the ABS+PC alloy handle makes it easy to remove and carry the battery when needed. With CE, ROHS, and UN38.3 certifications, this battery has gone through the standard safety testing that you want to see on any lithium pack.
Specs and Value
The core specifications of the Xiseny 48V 13Ah are 48V nominal voltage and 13Ah capacity for a total of 624Wh of energy storage. These specs put the battery above most 10Ah folding packs and into territory where you can reasonably expect to cover 20 miles or more on a single charge using moderate levels of pedal assist. The battery uses A-grade lithium-ion cells in a standard 13S configuration, though Xiseny does not identify the specific cell brand.
Physical specs
The product images show the dimensions of the battery to be 420 x 113 x 58mm (approximately 16.54 x 4.45 x 2.28 inches), but the bullet point specifications list 390 x 110 x 76mm. This discrepancy between the listed dimensions and the image dimensions means you need to measure your current battery or the frame space available before placing an order to make sure it fits properly.
The battery housing is made from aluminum, and the handle is ABS+PC alloy, which is a step up from the all-plastic housings found on lower-cost silver fish batteries. The LED power indicator on the top of the battery lets you check the remaining charge level without turning on the bike. The included charger is listed as a 2A unit. One odd detail in the listing is that the charger is identified as "42V2A" in the bullet points, but a 48V battery (13S) requires a 54.6V charger. The 42V figure corresponds to a 36V battery charger. This is likely a listing error, and the actual charger supplied should be 54.6V, but confirming this with Xiseny before making a purchase is recommended.
BMS and motor range
The built-in BMS has a maximum continuous discharge rating of 30A, which is a common and capable rating for a silver fish battery in this price range. At 48V, 30A continuous represents roughly 1440W of theoretical output, which is well above what a 1000W motor typically draws under normal operating conditions. The BMS provides overcharge protection, deep discharge protection, overcurrent protection, and short circuit protection. Xiseny reports that the BMS is designed to prevent delays in protection and failures, which implies the BMS responds quickly enough to catch problems before they result in battery damage.
Xiseny rates the battery for motors from 250W to 1000W. The 30A BMS should handle any motor in that range without cutting out prematurely. The cells are described as A-grade with a life expectancy of up to 5 years and over 78% capacity retention after 1000 cycles. If the cells deliver on that claim, riders using this battery for daily commuting should get several years of reliable service before noticing meaningful capacity loss.
Form Factor and Compatibility
The Xiseny 48V 13Ah is a silver fish style battery, which is one of the most common form factors for folding and compact ebikes. The battery enters the frame from the top and locks into position with the included key. The discharge port uses a 5-pin connector with ribbing around the opening, and the product images specifically warn buyers to check that their existing battery uses the same connector layout before ordering.
The listing identifies compatible ebikes as NARRAK, APYEAR, EBKAROCY, MiFa, Rex, Prophete, Aldi, Avocet, Viking, and Byocycles. That is a pretty broad list covering both US and European folding ebike brands. Although the compatibility list is long, the physical dimensions and connector type still need to match your specific bike. Silver fish batteries come in a few different dimension variations, and the connector pin count and layout can differ between brands. The safest approach is to measure your current battery and compare the dimensions and discharge connector against the Xiseny spec sheet.
Based on the product images, the installation process is straightforward. You open the folding buckle on the frame, slide the battery into the cavity, insert the key to lock it in place, and close the fastener. The key also functions as the power switch, which is a standard feature on silver fish batteries.
Real-World Range
With 624Wh of capacity, the Xiseny 48V 13Ah provides more range than most 10Ah silver fish packs and should cover a good distance on a single charge. On a 500W motor with moderate pedal assist on flat terrain, the expected range would be approximately 20 to 30 miles per charge. On a 750W or 1000W motor with heavier throttle input and hilly terrain, the expected range drops to approximately 10 to 18 miles per charge. For commuters who ride 10 to 15 miles each way, this battery should handle the daily round trip on a single charge under normal conditions.
The 624Wh capacity is a nice sweet spot for riders who want more range than a standard 10Ah pack without jumping up to the size and weight of a 20Ah battery. The silver fish form factor keeps things compact, and the 13Ah capacity provides a meaningful bump in range over the 10Ah batteries that dominate this form factor. Check our comparison table to compare the Xiseny 48V 13Ah against other 48V silver fish batteries on price per watt-hour.
What Amazon Reviewers Are Saying
The Xiseny 48V 13Ah has 3 verified customer reviews on Amazon with a 4.3 out of 5 star average rating as of the publication of this article. One reviewer gave the battery 5 stars and described it as an "awesome battery" that increased the speed of their bike, lasted a long time, and was easy to install. The reviewer also noted that it was great value for the money.
With only 3 reviews, the sample size is small, but the overall sentiment is positive. The 4.3 star average suggests that at least one review was less favorable, but the visible 5-star review highlights easy installation and good performance. For a battery that has been available since September 2024, the low review count is typical for a smaller brand like Xiseny that doesn't have the marketing reach of larger ebike battery brands.
If you are considering this battery and want more buyer feedback before purchasing, check our battery comparison table for other 48V silver fish batteries that have more established review histories. If the positive review feedback and the competitive price per watt-hour are enough to give you confidence, the Xiseny 48V 13Ah is worth a closer look.
Who Should Buy This
The Xiseny 48V 13Ah is a good option for folding and compact ebike owners who need a silver fish replacement battery with more capacity than the typical 10Ah packs. The 624Wh capacity provides a meaningful range improvement, and the 30A BMS supports motors up to 1000W. The aluminum shell and LED power indicator add build quality and convenience that you don't always get in this price range.
The broad compatibility list covering both US and European ebike brands makes this battery a potential fit for a wide range of bikes, though buyers should still verify dimensions and connector type before ordering. The dimension discrepancy between the bullet points and product images is a concern that could cause fitment issues, so measuring your existing battery is the best way to avoid surprises. The charger voltage listed in the bullets (42V) also doesn't match the expected 54.6V for a 48V battery, so confirming this with Xiseny prior to purchasing is recommended. For riders who can verify compatibility with their bike, the Xiseny 48V 13Ah offers solid capacity and value. Compare it against other options on our comparison table.
Frequently Asked Questions
What ebikes is the Xiseny 48V 13Ah compatible with? Xiseny lists compatibility with NARRAK, APYEAR, EBKAROCY, MiFa, Rex, Prophete, Aldi, Avocet, Viking, and Byocycles ebikes. The battery uses a silver fish form factor with a 5-pin discharge connector. Verify that your specific ebike model uses the same connector type and can accommodate the battery dimensions before purchasing.
What is the BMS rating on the Xiseny 48V 13Ah? The BMS is rated at 30A continuous discharge. This supports motors from 250W to 1000W. The BMS provides overcharge, over-discharge, overcurrent, and short circuit protection.
How much does the Xiseny 48V 13Ah weigh? The listing does not specify the exact weight. Based on the 624Wh capacity and aluminum shell construction, expect the battery to weigh somewhere in the range of 8 to 10 pounds, which is typical for a 13Ah silver fish pack.
What charger comes with the Xiseny 48V 13Ah? The listing includes a 2A charger. With a 2A charger, a full charge from empty should take approximately 6.5 to 7 hours. The charger voltage is listed as 42V in the bullet points, but a 48V battery requires a 54.6V charger. Confirm the charger specifications with Xiseny before purchasing.
What certifications does the Xiseny 48V 13Ah have? The battery has CE, ROHS, and UN38.3 certifications. Xiseny states that all batteries have passed QC testing before leaving the factory, including capacity tests and short circuit tests.
Does the Xiseny 48V 13Ah have an LED power indicator? Yes, the battery has an LED power indicator built into the housing that lets you check the remaining charge level without turning on the bike.