{"product_id":"eunorau-48v15ah-secondary-ebike-battery","title":"Eunorau 48V 15Ah Secondary E-Bike Battery","description":"\u003cdiv class=\"rt-flow\"\u003e\n\u003cstyle\u003e\n.rt-flow{--rt-ink:#111;--rt-sub:#555;--rt-line:#e8e8e8;--rt-accent:#c8102e;--rt-good:#0a7d3f;--rt-warn:#b3261e;font-family:inherit;color:var(--rt-ink);line-height:1.55;max-width:var(--page-width,1900px);margin:0 auto;padding-inline:clamp(0.5rem,1vw,1rem);}\n.rt-flow *{box-sizing:border-box;}\n.rt-flow h2{font-size:1.9rem;font-weight:800;letter-spacing:-.02em;margin:3.5rem 0 1rem;}\n.rt-flow h3{font-size:1.25rem;font-weight:700;margin:0 0 .6rem;}\n.rt-answer{max-width:900px;margin:0 auto 2.5rem;padding:1.5rem 1.75rem;border:1px solid var(--rt-line);border-left:4px solid var(--rt-accent);border-radius:14px;background:#fcfcfc;}\n.rt-answer p{margin:0;font-size:1.1rem;color:var(--rt-ink);}\n.rt-answer .rt-q{display:block;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--rt-accent);margin-bottom:.6rem;}\n.rt-stats{list-style:none;display:flex;flex-wrap:wrap;justify-content:center;gap:0;width:100%;margin:0 auto 3rem;padding:0;border:1px solid var(--rt-line);border-radius:18px;overflow:hidden;}\n.rt-stats li{flex:1 1 150px;padding:1.6rem 1rem;text-align:center;border-right:1px solid var(--rt-line);}\n.rt-stats li:last-child{border-right:0;}\n.rt-stats b{display:block;font-size:1.75rem;font-weight:800;letter-spacing:-.02em;}\n.rt-stats span{display:block;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--rt-sub);margin-top:.3rem;}\n.rt-fit{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin:0 0 1rem;}\n.rt-fit ul{margin:.4rem 0 0;padding-left:1.1rem;}\n.rt-fit li{margin:.35rem 0;color:var(--rt-sub);}\n.rt-feat{display:grid;grid-template-columns:1.4fr 1fr;gap:2.5rem;align-items:center;width:100%;margin:0 auto;padding:2.5rem 0;}\n.rt-feat:nth-of-type(even){grid-template-columns:1fr 1.4fr;}\n.rt-feat__media{min-width:0;}\n.rt-flow .rt-feat__media img{display:block!important;width:100%!important;height:auto!important;max-width:100%!important;object-fit:contain!important;border-radius:20px;box-shadow:0 24px 60px -28px rgba(0,0,0,.35);}\n.rt-feat__txt h3{font-size:2.1rem;font-weight:800;letter-spacing:-.02em;margin:0 0 .8rem;line-height:1.12;}\n.rt-feat__txt p{font-size:1.08rem;color:var(--rt-sub);margin:0;max-width:52ch;}\n.rt-feat__kicker{display:inline-block;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--rt-accent);margin-bottom:.6rem;}\n.rt-feat:nth-of-type(even) .rt-feat__media{order:2;}\n.rt-ledger{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin:1rem 0 0;}\n.rt-ledger\u003ediv{border:1px solid var(--rt-line);border-radius:16px;padding:1.4rem 1.6rem;}\n.rt-ledger h3{font-size:1.05rem;text-transform:uppercase;letter-spacing:.08em;}\n.rt-ledger--good h3{color:var(--rt-good);}\n.rt-ledger--bad h3{color:var(--rt-warn);}\n.rt-ledger ul{margin:.6rem 0 0;padding-left:1.1rem;}\n.rt-ledger li{margin:.5rem 0;color:var(--rt-sub);}\n.rt-tablewrap{width:100%;overflow-x:auto;border:1px solid var(--rt-line);border-radius:18px;margin:1rem 0 0;}\n.rt-tablewrap table{width:100%;border-collapse:collapse;min-width:560px;}\n.rt-tablewrap th,.rt-tablewrap td{padding:.85rem 1.2rem;border-bottom:1px solid var(--rt-line);text-align:left;font-size:.97rem;vertical-align:top;}\n.rt-tablewrap thead th{background:#fafafa;font-weight:700;}\n.rt-tablewrap tr:last-child td{border-bottom:0;}\n.rt-tablewrap td:first-child,.rt-tablewrap th:first-child{font-weight:600;}\n.rt-src{font-size:.85rem;color:var(--rt-sub);margin:.7rem 0 0;}\n.rt-src a{color:var(--rt-sub);}\n.rt-addr{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em;color:var(--rt-sub);}\n.rt-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem;margin:1rem 0 0;}\n.rt-cards\u003ediv{border:1px solid var(--rt-line);border-radius:16px;padding:1.3rem 1.5rem;}\n.rt-cards h3{font-size:1rem;text-transform:uppercase;letter-spacing:.07em;color:var(--rt-accent);}\n.rt-cards p,.rt-cards li{color:var(--rt-sub);font-size:.95rem;}\n.rt-cards ul{margin:.5rem 0 0;padding-left:1.1rem;}\n.rt-faq{margin:1rem 0 0;border:1px solid var(--rt-line);border-radius:18px;overflow:hidden;}\n.rt-faq details{border-bottom:1px solid var(--rt-line);}\n.rt-faq details:last-child{border-bottom:0;}\n.rt-faq summary{padding:1.1rem 1.5rem;font-weight:650;cursor:pointer;font-size:1.03rem;}\n.rt-faq .rt-a{padding:0 1.5rem 1.2rem;color:var(--rt-sub);margin:0;}\n.rt-note{margin:2.5rem 0 0;padding:1.1rem 1.4rem;border:1px dashed var(--rt-line);border-radius:14px;font-size:.9rem;color:var(--rt-sub);}\n@media(max-width:800px){.rt-feat,.rt-feat:nth-of-type(even){grid-template-columns:1fr;gap:1.25rem;padding:2rem 0;}.rt-feat:nth-of-type(even) .rt-feat__media{order:0;}.rt-feat__txt h3{font-size:1.6rem;}.rt-ledger,.rt-fit{grid-template-columns:1fr;}}\n\u003c\/style\u003e\n\u003cdiv class=\"rt-answer\"\u003e\n\u003cspan class=\"rt-q\"\u003eQuick answer\u003c\/span\u003e\u003cp\u003eThis is the second battery that unlocks the long-range figures quoted on Eunorau's dual-battery bikes. Eunorau specifies a 48V 15Ah down-tube lithium-ion pack weighing 9.9 lbs, with a 500–800 charge-cycle life, 2A standard or 3A fast charging, and a BMS covering short-circuit, over-charge, over-discharge and balance protection. $499.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWho the 48V 15Ah Secondary Battery is for\u003c\/h2\u003e\n\u003cdiv class=\"rt-fit\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eBuy it if\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOwners of a dual-battery-capable Eunorau who want the advertised maximum range\u003c\/li\u003e\n\u003cli\u003eLong days where a mid-ride recharge isn't practical\u003c\/li\u003e\n\u003cli\u003eRiders who'd rather carry a spare than plan around charge stops\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eLook elsewhere if\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYour bike isn't wired for a second battery — check the model's spec sheet or ask us first\u003c\/li\u003e\n\u003cli\u003eYou own a 17\" Defender: Eunorau states the 17Ah pack is not compatible with that frame\u003c\/li\u003e\n\u003cli\u003eYour usual ride is already inside the single-battery range — this is weight you'd carry for nothing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003csection class=\"rt-feat\"\u003e\n\u003cdiv class=\"rt-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/V1A1468.jpg?v=1786383418\" alt=\"Eunorau 48V 15Ah Secondary E-Bike Battery — 48V 15Ah, Down-Tube Format\" width=\"1600\" height=\"1600\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"rt-feat__txt\"\u003e\n\u003cspan class=\"rt-feat__kicker\"\u003eCapacity\u003c\/span\u003e\u003ch3\u003e48V 15Ah, Down-Tube Format\u003c\/h3\u003e\n\u003cp\u003eEunorau specifies a 48V nominal, 15Ah down-tube lithium-ion pack measuring 170 x 140 x 440 mm (6.7 x 5.5 x 17.3 in) and weighing 4.5 kg \/ 9.9 lbs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"rt-feat\"\u003e\n\u003cdiv class=\"rt-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/V1A1461.jpg?v=1786383418\" alt=\"Eunorau 48V 15Ah Secondary E-Bike Battery — 2A Standard, 3A Fast\" width=\"1600\" height=\"1600\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"rt-feat__txt\"\u003e\n\u003cspan class=\"rt-feat__kicker\"\u003eCharging\u003c\/span\u003e\u003ch3\u003e2A Standard, 3A Fast\u003c\/h3\u003e\n\u003cp\u003eCharges at 2A as standard or 3A on a fast charger, and Eunorau rates the pack at 500–800 charge cycles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"rt-feat\"\u003e\n\u003cdiv class=\"rt-feat__media\"\u003e\u003cimg loading=\"lazy\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/V1A1468.jpg?v=1786383418\" alt=\"Eunorau 48V 15Ah Secondary E-Bike Battery — BMS Protection\" width=\"1600\" height=\"1600\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"rt-feat__txt\"\u003e\n\u003cspan class=\"rt-feat__kicker\"\u003eSafety\u003c\/span\u003e\u003ch3\u003eBMS Protection\u003c\/h3\u003e\n\u003cp\u003eThe battery management system covers short-circuit, over-charge and over-discharge protection plus cell balancing. Continuous discharge is 25–30A with a 45–60A peak.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003ch2\u003eThe honest ledger\u003c\/h2\u003e\n\u003cdiv class=\"rt-ledger\"\u003e\n\u003cdiv class=\"rt-ledger--good\"\u003e\n\u003ch3\u003eGreen flags\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e500–800 charge cycles, published by Eunorau rather than left vague\u003c\/li\u003e\n\u003cli\u003eFull BMS: short-circuit, over-charge, over-discharge and cell-balance protection\u003c\/li\u003e\n\u003cli\u003eSupports 2A standard and 3A fast charging\u003c\/li\u003e\n\u003cli\u003e25–30A continuous discharge, rated by Eunorau for 250W–1000W motors\u003c\/li\u003e\n\u003cli\u003e9.9 lbs and a standard down-tube format\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rt-ledger--bad\"\u003e\n\u003ch3\u003eRed flags\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCompatibility is model-specific and not universal across the Eunorau range — confirm before ordering\u003c\/li\u003e\n\u003cli\u003eEunorau publishes no UL certification for this pack specifically; if your building requires a UL-listed battery, ask us first\u003c\/li\u003e\n\u003cli\u003eBatteries are consumables: cycle life is a manufacturer figure and real capacity fades with age, heat and deep discharges\u003c\/li\u003e\n\u003cli\u003eUsed batteries are not returnable once installed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eFull specifications\u003c\/h2\u003e\n\u003cdiv class=\"rt-tablewrap\"\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e48V15Ah lithium-ion ebike battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e48V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Capacity\u003c\/td\u003e\n\u003ctd\u003e15Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimension\u003c\/td\u003e\n\u003ctd\u003e170*140*440mm \/ 6.7*5.5*17.3in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e4.5kg \/ 9.9lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Charge\u003c\/td\u003e\n\u003ctd\u003e2A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFast charge\u003c\/td\u003e\n\u003ctd\u003e3A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous Discharge Current\u003c\/td\u003e\n\u003ctd\u003e25A-30A suitable for 250w\/350w 500w\/750w\/1000w motor kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eDown tube battery type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak discharge current\u003c\/td\u003e\n\u003ctd\u003e45-60A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCycle life\u003c\/td\u003e\n\u003ctd\u003e500-800times\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharger\u003c\/td\u003e\n\u003ctd\u003e2A charger\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication bike\u003c\/td\u003e\n\u003ctd\u003eElectric bicycles, electric tricycles, electric motorcycles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMS and Balance\u003c\/td\u003e\n\u003ctd\u003eShort-circuit protection, Over-charge protection, Over-discharge protection, Over-current protection, Balance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity range\u003c\/td\u003e\n\u003ctd\u003eThis type of battery can be customized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"rt-src\"\u003eSpecifications as published by Eunorau at \u003cspan class=\"rt-addr\"\u003eeunorau-ebike.com\/products\/eunorau-48v15ah-second-battery\u003c\/span\u003e, verified 2026-08-13. We publish the manufacturer's figures as given and do not add specs Eunorau does not state. Found an error? Email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eWarranty\u003c\/h2\u003e\n\u003cdiv class=\"rt-tablewrap\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eCoverage\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame\u003c\/td\u003e\n\u003ctd\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e24 months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e24 months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical components\u003c\/td\u003e\n\u003ctd\u003e24 months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cdiv class=\"rt-cards\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eWhat it covers\u003c\/h3\u003e\n\u003cp\u003eManufacturing defects in Eunorau's original parts and components.\u003c\/p\u003e\n\u003cp\u003eEunorau states it continues to support the product after the warranty period as a manufacturer courtesy, and may ask only for shipping costs on replacement parts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eWhat you must do\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYou are the original purchaser — the warranty does not transfer\u003c\/li\u003e\n\u003cli\u003eProof of purchase (your Redtail order confirmation)\u003c\/li\u003e\n\u003cli\u003eProduct registration with Eunorau right after purchase\u003c\/li\u003e\n\u003cli\u003eAn e-bike check-up by a Eunorau specialist or dealer after the first year of use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eNot covered\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOrdinary wear and tear — brake pads, rotors, spokes, grips, shifters, brake cables and casings, tires and tubes, chains, chainrings, cassettes, transmission gears\u003c\/li\u003e\n\u003cli\u003eLabor charges for part replacement\u003c\/li\u003e\n\u003cli\u003eCorrosion from moisture or heat, and cosmetic deterioration of the finish\u003c\/li\u003e\n\u003cli\u003eDamage from accident, abuse, stunt riding, racing, improper storage, or neglect\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"rt-src\"\u003e24-Month+ Limited Warranty issued by Eunorau Bikes, a Nevada corporation. Bikes bought for commercial use — rental fleets, delivery, sharing programs — get a 50% reduced warranty period. Full terms are published by Eunorau at \u003cspan class=\"rt-addr\"\u003eeunorau-ebike.com\/pages\/warranty\u003c\/span\u003e. Redtail coordinates warranty claims for bikes bought from us, so send it to us rather than to Eunorau: \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eManuals \u0026amp; documentation\u003c\/h2\u003e\n\u003cdiv class=\"rt-cards\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eEunorau's spec sheet for this model lists a printed manual and a tool kit as included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eAny other document\u003c\/h3\u003e\n\u003cp\u003eEunorau publishes display, controller, shock and accessory manuals across several files. Tell us which one you need and we will send you our copy, so you are not hunting through a supplier download hub.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"rt-src\"\u003eEunorau publishes display and component manuals rather than a per-bike user manual. We link only the manual Eunorau lists against this exact model. Need a document we haven't linked? Email \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e and we'll request it from Eunorau.\u003c\/p\u003e\n\u003ch2\u003eShipping, returns \u0026amp; support\u003c\/h2\u003e\n\u003cdiv class=\"rt-cards\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eShipping\u003c\/h3\u003e\n\u003cp\u003eFree shipping on every electric bike within the contiguous United States (lower 48).\u003c\/p\u003e\n\u003cp\u003eOrders are prepared and dispatched within 1–3 business days. Most e-bikes arrive within 5–10 business days after dispatch.\u003c\/p\u003e\n\u003cp\u003eShips via UPS, FedEx, or LTL freight for larger items, with tracking emailed at dispatch. Freight deliveries may need a scheduled appointment and a signature.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eOn delivery\u003c\/h3\u003e\n\u003cp\u003eInspect your shipment at delivery. Damage, defects, or incorrect items must be reported with photos within 48 hours.\u003c\/p\u003e\n\u003cp\u003eIf a bike arrives dead, won't charge, throws an error code, or has a faulty component, it is covered under the manufacturer warranty and Redtail coordinates repair or replacement remotely.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eReturns\u003c\/h3\u003e\n\u003cp\u003eChange-of-mind returns accepted only on unopened, factory-sealed items requested within 72 hours of delivery, with a 15% restocking fee plus return shipping. Once a box is opened or a bike is ridden, it is no longer eligible.\u003c\/p\u003e\n\u003cp\u003eOrder cancellations carry a 3% transaction fee, because card-processing fees are non-recoverable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"rt-src\"\u003eAlaska, Hawaii, U.S. territories, P.O. boxes, and remote areas may incur extra charges or be excluded — contact us before ordering. Full terms: \u003ca href=\"\/pages\/shipping-policy\"\u003eShipping Policy\u003c\/a\u003e · \u003ca href=\"\/pages\/refund-policy\"\u003eRefund \u0026amp; Return Policy\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cdiv class=\"rt-faq\"\u003e\n\u003cdetails open\u003e\u003csummary\u003eWhich Eunorau bikes take this second battery?\u003c\/summary\u003e\u003cp class=\"rt-a\"\u003eEunorau describes it as suitable for electric bicycles, tricycles and motorcycles running 250W–1000W motors, but the fit is model-specific. On our pages, any bike whose range figure reads \"with dual batteries\" is designed for a second pack. One documented exception: Eunorau states the 17Ah pack is not compatible with the 17\" Defender. Email support@redtailebikes.com with your model and we'll confirm before you order.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow much extra range does a second battery give?\u003c\/summary\u003e\u003cp class=\"rt-a\"\u003eIt roughly doubles capacity, which is why Eunorau's headline range figures — 80 miles on the Defender and SPECTER-S, 100 miles on the META26 — all assume both packs fitted. The exact gain depends on terrain, rider weight and assist level.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow long does the battery last?\u003c\/summary\u003e\u003cp class=\"rt-a\"\u003eEunorau publishes 500–800 charge cycles. That's a manufacturer figure: real-world life depends on heat, storage charge level and how deeply you discharge it. Expect gradual capacity loss rather than sudden failure.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat warranty covers this battery?\u003c\/summary\u003e\u003cp class=\"rt-a\"\u003eEunorau's 24-Month+ Limited Warranty covers batteries for 24 months against manufacturing defects. It requires registration with Eunorau after purchase and applies to the original purchaser only. Redtail coordinates claims for batteries bought from us.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow does it ship, and can I return it?\u003c\/summary\u003e\u003cp class=\"rt-a\"\u003eParts and accessories ship within the contiguous U.S. and may ship separately from a bike, which can take longer. Inspect on arrival — damage or the wrong item must be reported with photos within 48 hours. Unopened change-of-mind returns are accepted within 72 hours with a 15% restocking fee plus return shipping; used parts and accessories are not returnable.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003ch2\u003eKeep looking\u003c\/h2\u003e\n\u003cp\u003e\n\u003ca href=\"\/collections\/eunorau\"\u003eAll Eunorau e-bikes we stock\u003c\/a\u003e  ·  \u003ca href=\"\/pages\/brands\"\u003eEvery e-bike brand at Redtail\u003c\/a\u003e  ·  \u003ca href=\"\/pages\/shop-ebikes\"\u003eShop electric bikes by type\u003c\/a\u003e\n\u003c\/p\u003e\n\u003cp class=\"rt-note\"\u003e\u003cstrong\u003eHow we verified this page.\u003c\/strong\u003e Every specification above was read from Eunorau's own published product page on 2026-08-13 and is reproduced as Eunorau states it. Where Eunorau does not publish a figure, this page leaves it out rather than estimating. Warranty terms are Eunorau's, quoted from their warranty policy; shipping and return terms are Redtail's own. Prices are USD and current at the date shown. Corrections: \u003ca href=\"mailto:support@redtailebikes.com\"\u003esupport@redtailebikes.com\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Eunorau","offers":[{"title":"Default Title","offer_id":52788413563163,"sku":null,"price":499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/V1A1468.jpg?v=1786383418","url":"https:\/\/redtailebikes.com\/products\/eunorau-48v15ah-secondary-ebike-battery","provider":"Redtail Ebikes","version":"1.0","type":"link"}