Eunorau Seat Tube E-Bike Battery Review
A 48V seat tube e-bike battery in two capacities, 12.5AH from $399 and 17.5AH at $699, with a stated weight of about 4.5kg and a size of 75 x 110 x 365mm. It suits buyers who can confirm fit themselves, since no bike models are named.
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Our verdict
A fit for someone adding or replacing a 48V pack who can confirm mounting and connector themselves, since the page names no bike models. Pass on it if you need a fitment list or one cell brand stated per option. The main caveat is that the title says Seat Tube while the Type row says Down tube battery type.
- Best for
- Buyers comparing 48V packs at 12.5AH and 17.5AH who can confirm the fit and mounting on their own bike.
- Skip if
- You need a named bike fitment list, one stated cell brand per option, or a mounting type the page states consistently.
Why 3.6/5: Supported by the store's published battery terms and limited by the company's BBB profile, which shows an F grade, no accreditation and two unanswered complaints.
Two capacities define the Eunorau Seat Tube E-Bike Battery, a 48V pack offered as 12.5AH from $399 and 17.5AH at $699. The page says it uses original SANYO, LG or SAMSUNG cells, lists a size of 75 x 110 x 365mm and a weight of about 4.5kg, and describes the case as WHITEBAIT.
Specifications
| Spec | Page says |
|---|---|
| Nominal Voltage | 48V |
| Rated Capacity | 12.5Ah / 17.5Ah |
| Dimension | 75 x 110 x 365mm |
| Weight | about 4.5kg |
| Continuous Discharge Current | 25A-30A suitable for 250w 350w 500w 750w 1000w motor |
| Type | Down tube battery type |
Options and pricing
Two options appear under Battery: 48V 12.5AH at $399 and 48V 17.5AH at $699, both in stock when read, which is why the price shows as From $399. Black is the only color listed, and the table names a 2A charger without saying whether one is included in the price.
How it compares
The Eunorau FAT-HD Battery 15.6Ah is also $399, and the Eunorau MAX / G20 / G30 Cargo Bike Battery is $459, with original SAMSUNG 35E cells and three named cargo models. This page's 12.5AH option matches the FAT-HD on price and its 17.5AH option costs $699, but it names no bike models and no single cell brand.
Shipping, returns and warranty
Shipping: the shipping page says accessories and batteries go by FedEx or UPS in an estimated 5 to 9 days after 1 to 3 business days of processing; orders over $100 ship free and smaller orders pay $14.99, with a possible remote-area charge. If the local warehouse is out of stock, the item ships from an overseas warehouse in an estimated 10 to 15 business days, and there may be no carrier tracking until it reaches the destination country and clears customs. The FAQ gives 15 to 20 days for batteries sent from China. Returns: an order can be cancelled for a full refund before it ships or is produced, but not after it ships; the page asks buyers not to refuse a delivered e-bike and to contact the store instead. A return must be applied for within 7 calendar days of receipt, the product must be new and re-sellable (not assembled, ridden, used or damaged) and complete with its manuals, accessories and original packaging, and the buyer ships it back within 7 days at their own cost to Eunorau's warehouses in the US, Australia, Europe or the UK. The store inspects it within 5 days and refunds in full when the fault is Eunorau's (wrong, damaged or defective item) or minus the shipping cost when the reason is the customer's. The terms page says customers are charged shipping only once, returns included, with no restocking fee, which does not match the return page's wording. Warranty: the warranty page lists 24 months for the battery, covering manufacturing defects only; it is void if the battery's seals are broken, if the wrong or a misused charger was used, or if the battery was used in equipment other than the bike it is specified for. It is for the original purchaser, excludes shipping damage (report it at once with photos or video) and does not cover labor. Disputes under the warranty go to binding individual arbitration (AAA rules, Nevada law) unless the buyer emails an opt-out within 30 days of purchase.
Before you buy
The page shows 2 customer reviews with 100% of them five-star in the store's own widget, which we could not verify; several product pages show the same review counts or lists, so the figure may not belong to this item alone. Reputation: Eunorau E-Mobility USA Corp has an F grade on the Better Business Bureau, is not BBB accredited and has 2 complaints on file, both marked unanswered: a December 2025 request for proof that a bike sold as new was new, and a May 2025 report of a battery cover that would not latch, which the buyer attributes to a frame defect. A web search on 21 October 2026 found no Trustpilot page for Eunorau. The store says it has specialised in e-bikes since 2009 and designs its bikes in the US and manufactures them in Shanghai, while the BBB lists a business start date of 12 December 2019; the eunorau-ebike.com domain was registered on 27 July 2016.
What we liked
- Two capacities, 48V 12.5AH and 48V 17.5AH, so the buyer can choose by capacity
- Size (75 x 110 x 365mm) and weight (about 4.5kg) are both stated
- Discharge figures are given: 25A-30A continuous and 45-60A peak, with motors from 250w to 1000w listed
- BMS protections are listed: short-circuit, over-charge, over-discharge, over-current and balance
Worth noting
- The title says Seat Tube but the Type row says Down tube battery type, so the mounting is unclear
- No bike models are named, only broad applications such as electric bicycles, tricycles and motorcycles
- One size and one weight are given for both capacities
- Three cell brands are named (SANYO, LG, SAMSUNG) with no cell code and no per-option assignment
- The table lists a 2A charger without saying whether it comes with the pack
Questions before you buy
Which capacities does it come in?
Two: 48V 12.5AH at $399 and 48V 17.5AH at $699. The page also says this type of battery can be customized from 48v 7.8Ah-17.5Ah, but only the two options appear in the selector.
What discharge current does the page list?
A continuous discharge current of 25A-30A, described as suitable for 250w 350w 500w 750w 1000w motors, and a peak discharge current of 45-60A.
What are the size and weight?
The page gives a dimension of 75 x 110 x 365mm and a weight of about 4.5kg as single figures for both capacities.
How are Eunorau accessories and batteries shipped?
By FedEx or UPS, an estimated 5 to 9 days after 1 to 3 business days of processing; free over $100, otherwise $14.99. If local stock is out, the item ships from an overseas warehouse in an estimated 10 to 15 business days, possibly without tracking until it clears customs.
What is the return window?
The return page gives 7 calendar days from receipt to apply. The item must be new, unused and complete in its original packaging, and the buyer pays the return shipping to Eunorau's warehouse; the refund is full only when the fault is Eunorau's. Orders can be cancelled for free before they ship.
What does the warranty cover?
The warranty page lists 24 months on the battery for manufacturing defects only. Broken seals, an incompatible or misused charger, use in other equipment and shipping damage are excluded.
Sources & verification
What this review is based on and the day we last read it. Specs and claims from the maker are the maker’s own; the verdict and the rating are ours.
From the store
- Eunorau Seat Tube E-Bike Battery product page: specs, options and price (the buy buttons go there)Specs, options and the listed priceRead October 21, 2026
- Eunorau shipping informationFree FedEx/UPS to the lower 48 from Las Vegas; accessories free over $100; overseas-warehouse fallbackRead October 21, 2026
- Eunorau return policyCancel before shipment; 7 calendar days to apply for a return; customer pays return shippingRead October 21, 2026
- Eunorau warranty page (24-Month+ Limited Warranty)Frame 10 years, battery, motor and electronics 24 months; manufacturing defects only; exclusions; arbitrationRead October 21, 2026
- Eunorau FAQClass 1-3 definitions, weight capacity, battery life and charging, design and manufacturing locationsRead October 21, 2026
- Eunorau terms of servicePrices can change without notice; says customers pay shipping once, returns included, and no restocking feeRead October 21, 2026
- Eunorau About pageSays Eunorau has specialised in electric bikes since 2009 and sells in the US, Australia and parts of EuropeRead October 21, 2026
- Eunorau contact pageOrder, customer service and after-sales emails and phone lines; California showroom addressRead October 21, 2026
Independent
- BBB profile: Eunorau E-Mobility USA CorpGrade F, not BBB accredited, 2 complaints in 3 years both unanswered, 1 customer review listedRead October 21, 2026
- BBB complaints: Eunorau E-Mobility USA CorpDec 2025: proof-of-manufacture request unanswered; May 2025: battery cover would not latch, buyer cites a frame defectRead October 21, 2026
- Verisign RDAP record for eunorau-ebike.comDomain registered 2016-07-27Read October 21, 2026
What we couldn’t verify
- The product is named Seat Tube Battery but the Type row reads Down tube battery type; the page does not explain this and names no bike models.
- One weight and size cover both capacities, three cell brands are named without saying which goes in which option, and it is not stated whether the 2A charger row means a charger is included.
- The return page says the buyer pays return shipping, while the terms page says customers are charged shipping only once, returns included, with no restocking fee.
- The shipping page gives 10 to 15 business days for items shipped from overseas, while the FAQ gives 15 to 20 days for batteries sent from China.
Spotted an error or something out of date? Tell us and we’ll fix it and update the date.


