SAIKEUNG Polly DP7 21700 E-Bike Battery | 36V-72V
SAIKEUNG Polly DP7 21700 E-Bike Battery | 36V-72V
SAIKEUNG Polly DP7 Ultra High-Output 21700 E-Bike Battery Series – Extreme Performance Power Packs for 36V to 72V Systems (50A–100A Integrated BMS & Free 5A Fast Charger Included)
Dominate the road, maximize your throttle response, and crush range limitations. The SAIKEUNG Polly DP7 21700 Performance Battery Series is engineered from the ground up for high-wattage electric bicycles, long-range delivery setups, and aggressive custom e-bike builds. Designed to supply consistent, clean current without breaking a sweat, this flagship battery line is built around ultra-dense, authentic Grade-A 21700 cylindrical cells to deliver unrivaled energy density, low internal resistance, and superior power maintenance under heavy load.
Whether you are pushing a stealthy 250W commuter or building a high-torque 2000W to 3000W peak speed demon, our advanced variant options let you choose the ideal voltage, capacity, and form factor for your ride. Every single battery pack is equipped with a massive 50A to 100A heavy-duty circuit protection BMS to maintain precise cell equilibrium over 1000+ deep charge cycles.
🚀 Key High-Performance Features
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Massive 250W to 3000W Motor Support Window: Specially calibrated to supply stable current pathways for elite mid-drives and hub motors, including high-power Bafang BBSHD, CYC, Leaf Motor, and MXUS setups.
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Premium 21700 High-Density Matrix Construction: Built using top-tier 21700 cells that deliver a significantly flat discharge curve, ensuring your bike maintains its top-end speed even when your capacity drops below 30%.
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Competition-Grade 50A–100A Internal Smart BMS: Upgraded protection board actively balances cell rows while shielding your system from short-circuits, over-charging, over-discharging, and high-temperature spikes.
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Complimentary 5A High-Current Fast Charger: Cut your garage downtime in half! Every battery bundle includes a professional 5-Amp smart fan-cooled charger as a free gift.
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Authentic Global Quality Approvals: Independently tested and certified under CE, FCC, and RoHS safety standards with an active 1-year comprehensive factory replacement warranty.
📊 System Architecture & Form Factor Configuration Selector
Please review your frame space and system controller requirements to pick the ideal match:
Option A: Sleek Polly DP7 Frame Downtube Shell (Holds Max 70 Cells)
Ideal for standard e-bike frames utilizing the bottle cage mounting tracks.
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36V Nominal (10S Configuration): Available in 25Ah / 30Ah / 35Ah capacities.
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48V Nominal (13S Configuration): Available in 20Ah / 25Ah capacities.
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52V Nominal (14S Configuration): Available in 20Ah / 25Ah capacities.
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Chassis Shell Specs: 368mm × 95mm × 150mm | Features an integrated 5-Pin heavy discharge docking plate, mechanical key lock, on/off toggle switch, and multi-LED fuel gauge.
Option B: Heavy-Duty High-Capacity Triangle / Frame Bag Packs
Engineered for maximum power cell counts to handle high-voltage 2000W–3000W extreme builds.
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60V Nominal (16S Configuration): Available in 30Ah / 35Ah / 40Ah / 50Ah capacities.
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72V Nominal (20S Configuration): Available in 30Ah / 35Ah / 40Ah / 45Ah / 50Ah / 60Ah capacities.
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Chassis Shell Specs: Heavy-duty insulated protective casing wrapped in a waterproof fabric layer, tailored for central frame bag integration or custom seat boxes.
📐 Technical Architecture & Safety Operational Spec Sheet
| Comprehensive Battery Attributes | Premium Production Hardware Standards |
| Primary Cell Architecture | Authentic Grade-A 21700 Lithium Cylindrical Array |
| Available Voltage Selection | 36V / 48V / 52V / 60V / 72V DC Nominal |
| Scalable Capacity Windows | 20Ah up to 60Ah (Selectable via Dropdown Menu) |
| Integrated Safety BMS Board | Heavy-Duty Continuous 50A to 100A Protection Matrix |
| Long-Term Performance Retention | Retains ≥80% Capacity After 1000 Full deep cycles |
| Included Charging Hardware Bundle | Free 5-Amp Smart Fan-Cooled Rapid Charger |
| Safe Thermal Charging Threshold | 0°C to 45°C (32°F to 113°F) |
| All-Weather Discharge Threshold | -20°C to 65°C (-4°F to 149°F) |
| Certified Regulatory Compliance | CE, FCC, and RoHS Certified Production Lines |
| Hazardous Compound Registry | High-concerned chemical: None |
🔌 Choose Your Custom Discharge Lead Interface
To ensure a direct plug-and-play setup with your existing motor controller, every battery is custom-terminated to order. Choose your power adapter connection point during checkout:
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XT60 High-Current (Male/Female Included)
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XT90 Anti-Spark (Highly Recommended for 60V & 72V Systems)
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Anderson SB50 Power Blocks
📦 What's Inside the Box?
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1 x SAIKEUNG High-Capacity 21700 Premium Lithium E-Bike Battery Pack
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1 x Heavy-Duty Smart 5A Fast Grid Charger (US, EU, or UK Plug Based on Order Address)
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1 x Reinforced Mounting Base Dock Plate with Discharge Leads (Polly DP7 Shell Version Only)
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2 x Mechanical Anti-Theft Security Lock Keys (Polly DP7 Shell Version Only)
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1 x Custom Matching Main Power Discharge Connector Set
Stop stalling on step hill climbs and upgrade your ride to raw 21700 power cells. Select your target system voltage, capacity, and discharge plug connection profile below, click Add to Cart, and secure your high-performance battery upgrade today!
1. Maintenance service: 800 cycles warranty. If there are any quality issues, please contact us for free repair or replacement (if the battery damage is caused by personal behavior, the seller will not bear any losses or provide any services)
2. DDP services (tariffs for the following countries are borne by the seller): Russian Federation, Belarus, France, Ukraine, South Korea, Thailand, Singapore, Malaysia, Germany, Spain, Netherlands, Italy, Bulgaria, Belgium, Latvia, Poland, Denmark, Finland, Portugal, Sweden, Slovakia, Slovenia, Greece, Hungary, Czech Republic, Lithuania, Luxembourg, Romania, Ireland, Estonia, Austria, Croatia, Australia!
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 are optional, and will be provided according to the delivery country if not requested.
2. Discharge Connector: There are 9 kinds of optional (Product standard with connector XT60)as shown in the picture below, which will be soldered with the default female connector&extra male connector if requested.
3. If you have any requirements about this, please leave a message in your order.
E-bike 36V 21700 Samsung battery Specifications:
Rated voltage: 36V
Rated capacity: 25ah/30ah/35ah/40ah/50ah/60ah
Type composition: 10S5P
Battery: Built-in 21700 Samsung battery
Model: Electric scooter/electric bicycle/lithium-ion battery
Battery size: 368mm x 150mm x 95mm
Battery weight: about 6kg.
Charging method: CC / CV.
Standard charging current: 5A.
Maximum continuous charging current: 10A.
BMS: Maximum 100A,
Maximum peak current 100A
Charging voltage: 42V
Discharge cut-off voltage: 29.6V
Cycle life: 1000+ times
Charging temperature: -15-65℃
Discharge temperature: -15-65℃
Protection function: overcharge, overdischarge, overcurrent, short circuit, balance
Applicable motor: 250w 350w 500w 750w 1000w 1500w motor
(Note: the battery voltage must match the motor)
The packing list includes:
1 * 36V lithium-ion battery pack (with box)
1 * 30 cm cable assembly
1 * 42v 5A charger
E-bike 48V 21700 Samsung battery Specifications:
Rated voltage: 48V
Rated capacity: 25ah/30ah/35ah/40ah/50ah/60ah
Type composition: 13S5P
Battery: Built-in 21700 Samsung battery
Model: Electric scooter/electric bicycle/lithium-ion battery
Battery size: 368mm x 150mm x 95mm
Battery weight: about 7kg.
Charging method: CC / CV.
Standard charging current: 5A.
Maximum continuous charging current: 10A.
BMS: Maximum 100A,
Maximum peak current 100A
Charging voltage: 54.6V
Discharge cut-off voltage: 39.2V
Cycle life: 1000+ times
Charging temperature: -15-65℃
Discharge temperature: -15-65℃
Protection function: overcharge, overdischarge, overcurrent, short circuit, balance
Applicable motor: 250w 350w 500w 750w 1000w 1500w 2000w motor
(Note: the battery voltage must match the motor)
The packing list includes:
1 * 48V lithium-ion battery pack (with box)
1 * 30 cm cable assembly
1 * 54.6v 5A charger
E-bike 52V 21700 Samsung battery Specifications:
Rated voltage: 52V
Rated capacity: 25ah/30ah/35ah/40ah/50ah/60ah
Type composition: 14S5P
Battery: Built-in 21700 Samsung battery
Model: Electric scooter/electric bicycle/lithium-ion battery
Battery size: 368mm x 150mm x 95mm
Battery weight: about 7kg.
Charging method: CC / CV.
Standard charging current: 5A.
Maximum continuous charging current: 10A.
BMS: Maximum 100A,
Maximum peak current 100A
Charging voltage: 58.8V
Discharge cut-off voltage: 42V
Cycle life: 1000+ times
Charging temperature: -15-65℃
Discharge temperature: -15-65℃
Protection function: overcharge, overdischarge, overcurrent, short circuit, balance
Applicable motor: 250w 350w 500w 750w 1000w 1500w 2000w motor
(Note: the battery voltage must match the motor)
The packing list includes:
1 * 52V lithium-ion battery pack (with box)
1 * 30 cm cable assembly
1 * 58.8v 5A charger
E-bike 60V 21700 Samsung battery Specifications:
Rated voltage: 60V
Rated capacity: 20ah/25ah/30ah/35ah/40ah/50ah/60ah
Type composition: 16S4P
Battery: Built-in 21700 Samsung battery
Model: Electric scooter/electric bicycle/lithium-ion battery
Battery size: 368mm x 150mm x 95mm
Battery weight: about 7kg.
Charging method: CC / CV.
Standard charging current: 5A.
Maximum continuous charging current: 10A.
BMS: Maximum 100A,
Maximum peak current 100A
Charging voltage: 67.2V
Discharge cut-off voltage: 51.2V
Cycle life: 1000+ times
Charging temperature: -15-65℃
Discharge temperature: -15-65℃
Protection function: overcharge, overdischarge, overcurrent, short circuit, balance
Applicable motor: 250w 350w 500w 750w 1000w 1500w 2000w motor
(Note: the battery voltage must match the motor)
The packing list includes:
1 * 60V lithium ion battery pack (with box)
1 * 30 cm cable assembly
1 * 67.2v 5A charger
E bike 72V 21700 Samsung battery Specifications:
Battery Voltage: 72V
Rated capacity: 25ah/30ah/35ah/40ah/50ah/60ah
Category:Li-ion Battery
Battery core: built-in 21700 Samsung battery
Array mode: 20s3p
Battery size: 368*150*95mm (the measurement may have an error of 1-2mm)
Battery weight: about 7KG
Voltage : Peak - 84V, working - 72V
Maximum constant discharge current: 90A
Peak current: 100A
Charging voltage: 84V
Charging Current: <10 Amps
Discharge cut-off voltage: 60V
Power: 300W-3000W
Application: E-bike Battery, electric scooter, electric wheelchair
Charging method: CC/CV
Cycle life: 1000+times
Charging temperature: -15-65℃
Discharge temperature: -15-65℃
Protection function: overcharge, overdischarge, overcurrent, short circuit, balance
Applicable motor: 72V 250W-3000W motor
(Note: the battery voltage must match the motor)
The packing list includes:
1 * 72V lithium-ion battery pack (with box)
1 * 30 cm cable assembly
1 * 84v charger
Original 21700 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; 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 or 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 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.
