Ultra High-Capacity Down-Tube E-Bike Battery
Ultra High-Capacity Down-Tube E-Bike Battery
SAIKEUNG Ultra High-Capacity Down-Tube E-Bike Battery Series –
36V / 48V / 52V / 60V / 72V Platforms (17.5Ah to 60Ah Options) with Integrated 30A–90A BMS, USB Power Port & FREE 5A Fast Charger (Powers 250W to 3000W Motors)
Take your custom e-bike build, high-speed commuter, or extreme power delivery system to the next level with the SAIKEUNG Ultra High-Capacity Down-Tube E-Bike Battery Series. Offering an expansive range of system voltages from 36V up to high-voltage 72V and huge energy storage capacities ranging from 17.5Ah up to 60Ah, this battery platform is built to satisfy demanding riders and high-power setups from 250W up to 3000W.
Engineered for safety and maximum longevity, each unit features a heavy-duty 30A to 90A Smart Battery Management System (BMS) to ensure thermal stability and prevent voltage sag during heavy acceleration. Complete with an onboard USB port to charge mobile devices, UL/CE safety certifications, and a FREE 5A High-Speed Fast Charger included as a gift, this pack delivers continuous high-output power and exceptional ride range.
⚠️ Power System & Voltage Matching Notice
CRITICAL FITMENT & POWER SELECTION GUIDE:
Includes FREE 5A Smart Fast Charger: Every pack includes a complimentary 5A high-speed fast charger to minimize charging downtime.
Heavy-Duty 30A–90A Smart BMS: Integrated protection board rated up to 90A peak to support high-power motor kits rated up to 3000W.
Extended Cycle Life: High-density lithium cells rated to retain ≥80% capacity after 1,000+ full charge cycles.
Triple Safety Certified: Certified to UL, CE, and FCC safety standards for optimal battery safety and performance.
Onboard USB Charging: Integrated 5V USB output port lets you power smartphones, lights, or GPS devices directly from the main pack.
🚀 Key High-Performance Features
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Wide Range of Voltage & Capacity Options: Choose from 36V, 48V, 52V, 60V, or 72V platforms with capacities spanning 17.5Ah, 20Ah, 24Ah, 30Ah, 40Ah, 50Ah, and 60Ah.
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Extreme Motor Power Capability: Designed to run seamlessly with mid-drive and hub motors ranging from standard 250W city setups up to 2000W–3000W continuous output systems.
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High-Amp Protection Circuit (30A–90A BMS): Monitors cell status continuously while protecting against short circuits, over-charging, deep depletion, and thermal overload.
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Down-Tube Frame Casing with Quick-Release Lock: Compact 365mm x 110mm x 90mm housing fits securely onto down-tube mounts with key locking for theft prevention.
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12-Month Manufacturer Warranty: Fully backed by SAIKEUNG's 1-year limited warranty and support.
📊 Technical Specifications Matrix
| Specification Parameter | SAIKEUNG High-Capacity Series Specifications |
| Brand Name | SAIKEUNG |
| Casing Style | Down-Tube Frame Casing with USB Charging Port |
| System Voltage Options | 36V / 48V / 52V / 60V / 72V DC |
| Nominal Capacities | 17.5Ah / 20Ah / 24Ah / 30Ah / 40Ah / 50Ah / 60Ah |
| Integrated BMS Protection | 30A to 90A Smart BMS Protection Board |
| Supported Motor Output | 250W, 350W, 500W, 750W, 1000W, 1500W, 2000W, 3000W |
| Physical Dimensions | 365mm × 110mm × 90mm |
| Cycle Life Rating | ≥80% Capacity after 1,000 Complete Cycles |
| Auxiliary Ports | 5V USB Port (Mobile Phone Charging) |
| Included Gift | FREE 5A Smart High-Speed Charger Included |
| Safety Certifications | UL, CE, FCC Certified |
| Warranty | 12 Months Limited Warranty |
⚙️ Installation & Setup Sequence
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Mount Base Bracket: Securely attach the battery mounting rail to your frame down-tube mounting points.
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Wire Controller: Join the discharge leads from the mounting plate directly to your motor controller inputs, observing correct positive (+) and negative (-) polarity.
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Lock & Power Up: Slide the battery pack onto the bracket until clicked into place, turn the security key to lock, press the main power switch, and you are ready to ride.
📦 Package Contents
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1 x SAIKEUNG Down-Tube Lithium-Ion Battery Pack with USB Port & Smart BMS
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1 x Lockable Base Mounting Rail with Power Output Leads
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1 x FREE 5A Smart Fast Battery Charger
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2 x Frame Lock Security Keys
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1 x User Manual & Warranty Document
Unlock 3000W potential and extreme range with high-output SAIKEUNG power. Select your system voltage and capacity options below, click Add to Cart, and upgrade your e-bike today!
Notice for shipping time:
1. Since the battery is a special product, the transportation channel is different from that of ordinary products, and the delivery time will be longer than that of ordinary products, but we will use faster express delivery to mail it to you; please rest assured.
2. From the perspective of Chinese orders, it takes 1-2 days for stocking and 7-15 days for shipping to various countries. We choose air transportation (which belongs to land transportation in Russia) to deliver the products to customers in the fastest way possible (ignoring the default time on AliExpress)
Charger Plugs and Discharge Connectors Optional:
1. Charger Plug: US, EU, UK, AU plugs optional; will provide according to delivery country if not requested.
2. Discharge Connector: There are 9 kinds optional (Product standard with connector XT60)as below picture, will be soldered with default female connector&extra male connector if not requested.
3. If you have any requirements about this, please leave a message in your order.
36V Samsung Electric Bike Battery Specifications:
Nomal Volt: 36V
Rated Capacity:16ah/23ah/30ah/40ah/50ah
Battery Cell: 18650 Samsung battery
Type composition:10S5P
Battery size:365*110*90mm
Battery Weight: about 4KG
Max Constant Discharge Current:100A
Peak current:60A
BMS:30A-90A
Charge voltage:42V
Discharge cut-off voltage:28V
Charge Current:5A;
Charge Time:5-7Hours
Way of Charge: CC/CV
Cycle Life:800-1000 tims
Charge Temperature:-15-65℃
Discharge Temperature:-15-65℃
Protection Function: Overcharge, Overdischarge, Overcurrent, Short circuit, Balance
48V Samsung Electric Bike Battery Specifications:
Rated voltage: 48V
Rated capacity: 17.5ah/20ah/24ah/30ah/35ah/40ah/50ah
Battery Cell: 18650 Samsung battery
Type composition: 13S5P
Battery size: 365mm x 110mm x 90mm
Battery weight: about 5 kg.
Max Constant Discharge Current:100A
Peak current:60A
BMS: 30A-90A
Charging voltage: 54.6V
Discharge cut-off voltage: 39.2V
Standard charging current: 2A.
Charge Current:5A;
Charge Time:5-7Hours
Charging method: CC/CV
Cycle life: 800-1000 times
Charging temperature: -15-65℃
Discharge temperature: -15-65℃
Protection function: overcharge, overdischarge, overcurrent, short circuit, balance
52V Samsung Electric Bike Battery Specifications:
Rated voltage: 52V
Rated capacity:
20ah/25ah/30ah/35ah/40ah/45ah/50ah
Battery Cell: 18650 Samsung battery
Type composition: 14S4P
Battery size: 365mm x 110mm x 90mm
Battery weight: about 5 kg.
Max Constant Discharge Current:100A
Peak current:60A
BMS: 30A-90A
Charging voltage: 58.8V
Discharge cut-off voltage: 42V
Standard charging current: 2A.
Charge Current:5A;
Charge Time:5-7Hours
Charging method: CC/CV
Cycle life: 800-1000 times
Charging temperature: -15-65℃
Discharge temperature: -15-65℃
Protection function: overcharge, overdischarge, overcurrent, short circuit, balance
60V Samsung Electric Bike Battery Specifications:
Rated voltage: 60V
Rated capacity:
20ah/25ah/30ah/35ah/40ah/45ah/50ah
Battery Cell: 18650 Samsung battery
Type composition: 16S4P
Battery size: 365mm x 110mm x 90mm
Battery weight: about 5 kg.
Max Constant Discharge Current:100A
Peak current:60A
BMS: 30A-90A
Charging voltage: 67.2V
Discharge cut-off voltage: 48V
Standard charging current: 2A.
Charge Current:5A;
Charge Time:5-7Hours
Charging method: CC/CV
Cycle life: 800-1000 times
Charging temperature: -15-65℃
Discharge temperature: -15-65℃
Protection function: overcharge, overdischarge, overcurrent, short circuit, balance
72V Samsung Electric Bike Battery Specifications:
Rated voltage: 72V
Rated capacity:
20ah//30ah/40ah/50ah/60ah
Battery Cell: 18650 Samsung battery
Type composition: 20S3P
Battery size: 365mm x 110mm x 90mm
Battery weight: about 5 kg.
Max Constant Discharge Current:100A
Peak current:60A
BMS: 30A-90A
Charging voltage: 84V
Discharge cut-off voltage: 72V
Standard charging current: 2A.
Charge Current:5A;
Charge Time:5-7Hours
Charging method: CC/CV
Cycle life: 800-1000 times
Charging temperature: -15-65℃
Discharge temperature: -15-65℃
Protection function: overcharge, overdischarge, overcurrent, short circuit, balance
Original 18650 battery 36V 48V 52V 60V 72V electric bicycle battery suitable for 250W 350W 500W 750W 1000W 1500W 2000W 3000W motor kit!
(Please note: The voltage of the ordered battery must be the same as the voltage of the motor accessories; otherwise, it may cause incompatibility between the motor and battery)
36V-72V Precautions for battery use:
1. Before first use, please fully charge the battery.
2. Do not immerse the battery in water or get the battery wet!
3. Do not reverse the positive and negative poles, or short-circuit the battery with wires or other metallic objects!
4. Do not nail, knock, step on the battery or disassemble the battery and battery pack in any way!
5. It is forbidden to put the battery in the microwave oven, pressure vessel or fire source!
6. If the battery emits odor, heat, deformation, discoloration, or any abnormal phenomena, please stop using it immediately!
7. Do not use the battery in direct sunlight or a high-temperature environment. Otherwise, the battery pack will overheat, affecting battery performance and shortening battery life!
8. The battery pack and charger should be stored in a clean, dry, ventilated place, avoid contact with corrosive substances, and be kept away from fire and heat sources.
9. When the battery pack is to be stored for a long time, please charge the battery pack to about 50% capacity and store it in a dry and ventilated place, and charge it for 2 to 3 hours every 3 months.
10. If you have any questions about product quality, please contact us by email immediately; we will try our best to solve these problems!
Details
This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.
Shipping & Returns
We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.
We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.
