Eunorau FAT-HD Battery 15.6Ah Review

Built around 18650 cells in a 13S4P configuration, the FAT-HD Battery 15.6Ah is a 48V lithium-ion pack priced at $399, with a charge voltage limit of 54.6V and a continuous discharge current of 20A in its specification table. The page states that the charger is not included. Its title names the FAT-HD, but the page does not say which FAT-HD versions it fits.

Specifications

Options and pricing

A single Default Title variant is priced at $399 and was in stock when read; there is no crossed-out price and no color choice. Because the page states that the charger is not included, the $399 covers the battery alone.

How it compares

The Eunorau 48V 25Ah Reention Dorado ID-MAX Case Battery costs $699 and its listing names FAT-HD 1.0, FAT-HD 1.0 Pro and FAT-AWD among compatible bikes, while this $399 page names only the FAT-HD in its title. The Eunorau MAX / G20 / G30 Cargo Bike Battery is $459 and the Eunorau Seat Tube E-Bike Battery starts from $399.

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 1 customer review 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.