Replacement and second batteries for Eunorau e-bikes, with voltage, capacity, the models each page says it fits, and price.
Eunorau 48V 5Ah Secondary Battery, Type-C — read reviewA 48V 5Ah down tube secondary battery with RA4 (Male) and Type-C ports, listed at $219. The page lists it for charging phones, power banks and ebikes rated 500W and below, so it suits owners of those bikes who want a small secondary pack.
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Eunorau Seat Tube E-Bike Battery — read reviewA 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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Eunorau MAX / G20 / G30 Cargo Bike Battery — read reviewA 48V 20AH cargo bike battery at $459 for the Max-cargo, G20-cargo and G30-Cargo, listed with Samsung 18650 cells in a 13S4P configuration. It suits owners of those three models, though the table's 14Ah capacity row does not match the 20AH option sold.
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Eunorau SPECTER E-Bike Replacement Battery — read reviewA 48V battery for the SPECTER-S and SPECTER-ST, listed with Samsung 18650 cells and offered as 14AH at $499 (out of stock when read) and 17AH at $599. It suits SPECTER owners who need the 17AH pack, the only one with figures on the page.
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Eunorau Universal 48V 15Ah Secondary Battery — read reviewA 48V 15Ah down tube secondary battery at $499, listed for cargo, META, SPECTER, DEFENDER, FAT-HS, FAT-HD 2.0 and FAT-AWD bikes, with RA4, Bullet and XT60-F ports. The page gives 4.5kg and 170 x 140 x 440mm.
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Eunorau 52V 16Ah FLASH Main Battery — read reviewA 52V 16Ah rack-type main replacement battery for the Eunorau Flash and Flash Lite ST at $599, with LG cells and a 4A charger listed. It suits FLASH owners who accept a short specification, since the page gives no weight or dimensions.
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Eunorau 52V 21Ah FLASH Secondary Battery — read reviewA 52V 21Ah down tube secondary battery for the Eunorau Flash at $699, described as a HYFX-D LG3500 lithium battery with a stated weight of 13.9 lbs and a 4A charger listed. It suits Flash owners who want a secondary pack.
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Eunorau S500 / S1000 Second Battery 27Ah — read reviewAn optional second battery for the Eunorau S500 and S1000: 48V, 27Ah, DC charging port, one battery for $799. It suits owners who already have the standard battery and want a spare, though the page gives no weight or runtime figures.
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Eunorau Thermal Down-Tube Battery Wrap — read reviewA $69 thermal wrap for down tube e-bike batteries, listed at 47.5 cm (L) x 44 cm (W) in a composite material with neoprene in the middle. It suits cold-weather riders whose bike is not on the page's exclusion list.
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Eunorau FAT-HD Battery 15.6Ah — read reviewA 48V 15.6AH lithium-ion FAT-HD battery at $399, built from 18650 cells in a 13S4P configuration with a 20A continuous discharge current. The charger is not included, and the page's Rate row (672WH) conflicts with its own capacity figures.
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Eunorau Meta / Defender / HS Bike Battery — read reviewA 48V battery for FAT-HS, DEFENDER, URUS, META, FAT-AWD and FAT-HD2.0 bikes, offered as 15AH at $499 or 17AH at $599. The table lists Samsung 18650 cells in a 13S5P configuration, with one 672WH Rate row that the store's own FAQ formula contradicts.
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Eunorau NEW-TRIKE / ONE-TRIKE Battery — read reviewA 48V battery listed for NEW-TRIKE 1.0 and 2.0 and ONE-TRIKE 1.0 and 2.0, at $499 for 15AH or $599 for 20AH. It suits trike owners who only need the matching pack, since the page gives no cell, weight or charging details.
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Eunorau 52V 17Ah FLASH Third Battery — read reviewA 52V 17Ah top tube third battery for the FLASH e-bikes at $599, described as a Hailong lithium battery weighing 10.5 lbs. It suits FLASH owners adding a third pack, though the page is inconsistent about Flash Lite ST fitment.
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Eunorau 48V 25Ah Dorado ID-MAX Battery — read reviewA 48V 25AH Reention Dorado ID-MAX case battery at $699, listed for Eunorau FAT-HD 1.0, FAT-HD 1.0 Pro, FAT-AWD, UHVO(48V) and E-TORQUE(48V) bikes and several other brands. The page's capacity and Rate row (672WH) do not agree, so the figures and fit need checking.
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Eunorau Dual Battery Parallel Connector — read reviewA small dual battery parallel connector listed at $59, with an 80mm wire that includes an XT60 end and a MAX 72V 40AH*2 line in its specification. It suits owners planning a two-battery setup who will check voltage and fit themselves.
EUNORFACE4STORE2% offThe 15 products here all come from one store, Eunorau (eunorau-ebike.com, a US store with prices in dollars): 13 batteries and 2 add-ons, a dual battery parallel connector at $59 and a thermal down-tube battery wrap at $69, as checked on Oct 23, 2026. Batteries run from $219 (a 48V 5Ah secondary pack with a Type-C port) to $799 (a 48V 27Ah second battery for the S500 and S1000). Start with fit, because a pack has to suit the bike's voltage, mount and connector. Nine pages list the models they fit, from 2 models (Specter) to 11 (Meta, Defender and HS), and three FLASH pages list 52V packs while the other ten battery pages list 48V. Mounts named are down tube, seat tube, rack and top tube; the seat tube battery page even gives a Type row of 'Down tube battery type'.
Capacity is volts times amp-hours in watt-hours (Wh), the energy a pack stores. By that formula, which Eunorau's own FAQ uses, these packs run from 240 Wh (48V 5Ah) to 1,296 Wh (48V 27Ah). Three pages contradict it: the FAT-HD 15.6Ah page lists 672 Wh where 48V x 15.6Ah is 748.8 Wh; the Meta, Defender and HS page lists one 672 Wh for 15Ah and 17Ah options that the formula puts at 720 and 816 Wh; and the 48V 25Ah page lists 672 Wh against 1,200 Wh, with a web address that names 16Ah and 21Ah. The MAX, G20 and G30 page sells only a 48V 20Ah option, yet its Capacity row says 14Ah. Seven pages list a discharge current, the current the pack can deliver, and only four of the 13 batteries list a weight (4.5 kg on two, 10.5 lbs and 13.9 lbs on the others).
Every review here comes from Eunorau, so these are its terms. Batteries ship 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 ones pay $14.99. If the local warehouse is out of stock the pack ships from overseas in an estimated 10 to 15 business days, but the FAQ gives 15 to 20 days for batteries sent from China, and tracking may be missing until customs. A return must be applied for within 7 calendar days of receipt, for a new, unused pack complete in its original packaging; you pay the shipping back, although the terms page says shipping is charged only once. The warranty gives 24 months on the battery for manufacturing defects only, and is void if the seals are broken, the wrong or a misused charger was used, or the pack was used in equipment other than the bike it is specified for.
Before ordering, confirm what comes in the box and what the pack connects to. At least ten of the 13 battery pages do not say whether a charger is included, and the FAT-HD 15.6Ah page says it is not. The $59 connector's title says 24V to 60V while its specification line says MAX 72V 40AH*2, and the page does not say which limit applies. One FLASH page lists FLASH and FLASH Lite ST as compatible but names only Eunorau Flash in its application row, and the Universal 15Ah page says the rear shock must be locked out to use it on the SPECTER-S, DEFENDER-S 17 inch and FAT-HS 17 inch.
| Review | Price | Voltage and capacity | Fits (per the page) | Cells |
|---|---|---|---|---|
| Eunorau 48V 5Ah Secondary Battery, Type-C | $219 | 48V nominal, 5Ah rated | — | — |
| Eunorau Seat Tube E-Bike Battery | From $399 | 48V 12.5AH at $399 and 48V 17.5AH at $699 | — | Page says original SANYO, LG, SAMSUNG cells; no cell code |
| Eunorau MAX / G20 / G30 Cargo Bike Battery | $459 | Capacity 48V 20AH at $459 | Max-cargo, G20-cargo and G30-Cargo electric bikes | Samsung 18650 in 13S4P; page says original SAMSUNG 35E cells |
| Eunorau SPECTER E-Bike Replacement Battery | $599 | 48V 14AH at $499 (out of stock when read), 48V 17AH at $599 | SPECTER-S and SPECTER-ST | Samsung 18650 Li-ion; page says original SAMSUNG 35E cells |
| Eunorau Universal 48V 15Ah Secondary Battery | $499 | 48V nominal, 15Ah rated | — | SAMSUNG cells per the page; no cell code |
| Eunorau 52V 16Ah FLASH Main Battery | $599 | 52V nominal, 16Ah rated | Eunorau Flash, Flash Lite ST | LG cells, lithium ion; no cell code given |
| Eunorau 52V 21Ah FLASH Secondary Battery | $699 | 52V nominal, 21Ah rated | Eunorau Flash (Application bike row) | — |
| Eunorau S500 / S1000 Second Battery 27Ah | $799 | 48V, 27Ah | EUNORAU S500 and S1000 | — |
| Eunorau Thermal Down-Tube Battery Wrap | $69 | — | — | — |
| Eunorau FAT-HD Battery 15.6Ah | $399 | 48V, 15.6AH on the specification table | — | 18650 cell code, Li-ion, 13S4P configuration |
| Eunorau Meta / Defender / HS Bike Battery | From $499 | 48V 15AH at $499, 48V 17AH at $599 | FAT-HS, DEFENDER S, DEFENDER, URUS, META20, META24, META26, META275, FAT-AWD 2.0, FAT-AWD 3.0, FAT-HD2.0 | Samsung 18650 Li-ion, 13S5P, Model No. SSE-103 |
| Eunorau NEW-TRIKE / ONE-TRIKE Battery | From $499 | — | NEW-TRIKE 1.0, NEW-TRIKE 2.0, ONE-TRIKE 1.0, ONE-TRIKE 2.0 | — |
Multiply volts by amp-hours: 48V 15Ah is 720 Wh and 52V 16Ah is 832 Wh. Eunorau's FAQ uses the same method, but three pages list 672 Wh beside figures the formula puts higher: 748.8 Wh for 48V 15.6Ah, 720 and 816 Wh for 48V 15Ah and 17Ah, and 1,200 Wh for 48V 25Ah. Ask the store which figure is right for your pack.
Nine pages list the models they fit: for example the NEW-TRIKE and ONE-TRIKE pack (4 models), the SPECTER pack (SPECTER-S and SPECTER-ST) and the Meta, Defender and HS pack (11 models). Others are vague: the FAT-HD 15.6Ah page lists no versions, the 48V 25Ah page ends its list with 'Others', and the 5Ah secondary page names no bike. Confirm the fit, voltage and mount with the store before ordering.
Often the page does not say. At least ten of the 13 battery pages leave it open, and the FAT-HD 15.6Ah page states that the charger is not included. Several list a charger current (2A or 4A) without saying it is in the box. The warranty is void if the wrong or a misused charger was used, so ask which charger your pack needs.
The shipping page estimates 5 to 9 days after 1 to 3 business days of processing, free over $100 and $14.99 below. If the local warehouse is out of stock it ships from overseas in an estimated 10 to 15 business days, and the FAQ says 15 to 20 days for batteries sent from China, with possibly no tracking until customs. The SPECTER pack's 48V 14Ah option was out of stock when its page was read on Oct 21, 2026.
Eunorau's warranty page lists 24 months for the battery, covering manufacturing defects only, for the original purchaser and without labor. It is void if the battery's seals are broken, the wrong or a misused charger was used, or the battery was used in equipment other than the bike it is specified for. Shipping damage is excluded and must be reported at once with photos or video. Disputes go to binding arbitration unless you opt out by email within 30 days.
Eunorau's return page gives 7 calendar days from receipt to apply, for a new and re-sellable item, not used or damaged, complete with its original packaging. You ship it back within 7 days at your cost, and the refund is in full when the fault is Eunorau's or minus the shipping cost when the reason is yours. The terms page says shipping is charged only once, with no restocking fee, which does not match.