🔋 18650 10S8P Battery Pack — 37V 20800mAh 20.8Ah Large Capacity Li-ion Pack

Overview

This 18650 10S8P lithium-ion battery pack connects 80 Grade A 18650 cells in a 10-series 8-parallel configuration, delivering a massive 37V / 20800mAh (769.6Wh). As one of the highest-energy standard 18650 configurations available, it is purpose-engineered for electric bikes, high-capacity AGV systems, industrial robots, large portable power stations, and off-grid energy storage requiring multi-hour heavy-duty runtime at stable 36V-class output. Integrated smart BMS with 80-cell balancing, CE and UN38.3 certified, full OEM customization available. Sea freight recommended due to energy content exceeding IATA 160Wh limit.

10S8P Architecture

┌──────────────────────────────────────────────────────────┐
│ String 1: [C1]─[C2]─[C3]─[C4]─[C5]─[C6]─[C7]─[C8]─[C9]─[C10] │ 37V
│ String 2: [C1]─[C2]─[C3]─[C4]─[C5]─[C6]─[C7]─[C8]─[C9]─[C10] │ 37V
│ String 3: [C1]─[C2]─[C3]─[C4]─[C5]─[C6]─[C7]─[C8]─[C9]─[C10] │ 37V
│ String 4: [C1]─[C2]─[C3]─[C4]─[C5]─[C6]─[C7]─[C8]─[C9]─[C10] │ 37V
│ String 5: [C1]─[C2]─[C3]─[C4]─[C5]─[C6]─[C7]─[C8]─[C9]─[C10] │ 37V
│ String 6: [C1]─[C2]─[C3]─[C4]─[C5]─[C6]─[C7]─[C8]─[C9]─[C10] │ 37V
│ String 7: [C1]─[C2]─[C3]─[C4]─[C5]─[C6]─[C7]─[C8]─[C9]─[C10] │ 37V
│ String 8: [C1]─[C2]─[C3]─[C4]─[C5]─[C6]─[C7]─[C8]─[C9]─[C10] │ 37V
│                           ↓ Parallel ↓                          │
│              Total: 37V / 20800mAh = 769.6Wh                    │
│                      80 cells total                              │
└──────────────────────────────────────────────────────────────────┘

10S = 3.7V × 10 = 37V          ← e-bike standard voltage
 8P = 2600mAh × 8 = 20800mAh   ← massive capacity

Key Specifications

Parameter	Specification
Configuration	10S8P
Total Cells	80× Grade A 18650
Cell Capacity	2600mAh / cell
Nominal Voltage	37V
Fully Charged	42.0V
Capacity	20800mAh (20.8Ah)
Energy	769.6Wh
Internal Resistance	≤ 30mΩ (pack)
Weight	≈ 4.1kg
Recommended Charge	0.5C = 10.4A CC/CV
Max Charge Current	20.8A (1C)
Continuous Discharge	41.6A (2C)
Peak Discharge	83.2A (4C)
Max Peak Discharge	104A (5C, 30s)
Discharge Cut-off	30.0V (3.0V/cell)
Self-discharge Rate	≤ 2% / month
Cycle Life	≥ 500 cycles
Capacity Retention	≥ 80% at 500 cycles
Operating Temp	-20°C ~ 60°C
Storage Temp	-10°C ~ 25°C
Storage Voltage	38.0V (3.8V/cell)
Balance Connector	JST-XH 11Pin (10S)
Discharge Connector	Anderson SB175 / XT90 / custom
Wire Gauge	AWG8
Wire Length	250mm
Certification	CE / UN38.3 / RoHS

Full Voltage Reference

State	Voltage	Note
Fully charged	42.0V	4.2V × 10
Nominal	37.0V	Standard rating
Storage	38.0V	3.8V/cell — optimal
Low warning	33.0V	3.3V/cell — recharge
BMS cutoff	30.0V	3.0V/cell — hard stop
Overcharge cutoff	42.5V	4.25V/cell — BMS

Multi-Capacity SKU Options

SKU	Cell	Voltage	Capacity	Energy	Weight
10S8P-17600	2200mAh	37V	17600mAh	651.2Wh	≈3.6kg
10S8P-19200	2400mAh	37V	19200mAh	710.4Wh	≈3.8kg
10S8P-20800 ⭐	2600mAh	37V	20800mAh	769.6Wh	≈4.1kg
10S8P-24000	3000mAh	37V	24000mAh	888Wh	≈4.6kg
10S8P-27200	3400mAh	37V	27200mAh	1006.4Wh	≈5.1kg
10S8P-28000	3500mAh	37V	28000mAh	1036Wh	≈5.3kg

⭐ Default: 2600mAh Grade A — optimal cycle life, cost, and cell-matching consistency across 80 cells.

10S Series — Parallel Capacity Ladder

Config	Cells	Capacity	Energy	Weight	Best For
10S1P	10	2600mAh	96.2Wh	≈510g	Light e-bikes
10S2P	20	5200mAh	192.4Wh	≈1.0kg	Standard e-bikes
10S3P	30	7800mAh	288.6Wh	≈1.5kg	Performance e-bikes
10S4P	40	10400mAh	384.8Wh	≈2.1kg	Long-range e-bikes
10S5P	50	13000mAh	481Wh	≈2.6kg	E-bike + cargo
10S6P	60	15600mAh	577.2Wh	≈3.1kg	Heavy AGV
10S7P	70	18200mAh	673.4Wh	≈3.6kg	Industrial robot
10S8P ⭐	80	20800mAh	769.6Wh	≈4.1kg	Max range EV / AGV

Blue PVC Cylindrical Series — Full Voltage Ladder

Config	Voltage	Energy	Air Freight	Core Use
6S1P	22.2V	57.7Wh	✅ Section II	Power tools
7S1P	25.9V	67.3Wh	✅ Section II	E-scooters
8S1P	29.6V	76.9Wh	✅ Section IB	High-power tools
9S1P	33.3V	86.6Wh	✅ Section IB	Pre-36V systems
10S1P	37.0V	96.2Wh	✅ Section IB	Standard e-bikes
10S8P ⭐	37V	769.6Wh	🚢 Sea only	Max-range EV/AGV
13S1P	48.1V	125.1Wh	✅ Section IB	High-voltage e-bikes

Runtime Estimation

Device	Power Draw	10S8P Runtime
E-bike (city assist)	250W	≈ 2.6 hours
E-bike (full power)	500W	≈ 1.3 hours
Electric scooter	800W	≈ 49 min
Industrial AGV	500W	≈ 1.3 hours
Heavy robot arm	300W	≈ 2.2 hours
Portable power station	1000W	≈ 46 min
Off-grid solar backup	100W	≈ 6.5 hours
Electric boat (small)	600W	≈ 1.1 hours

📌 Based on 769.6Wh at 85% efficiency.

E-bike Range Estimation

Rider Weight	Terrain	Assist Level	Estimated Range
70kg	Flat urban	Eco (150W)	≈ 280km
80kg	Flat urban	Normal (250W)	≈ 168km
90kg	Mixed hills	Normal (350W)	≈ 120km
100kg	Hilly	Sport (500W)	≈ 84km

📌 Estimates vary by motor efficiency, tire pressure, wind, and riding style.

BMS Protection — 80-Cell System

Protection	Threshold	Function
⚡ Overcharge/cell	4.25V cutoff	All 80 cells monitored
🔋 Over-discharge/cell	2.75V cutoff	Full pack preservation
⚖️ Cell balancing	Auto on charge	Equalizes all 8 strings
🔥 Overcurrent	>104A trip	Protects motor & controller
⚠️ Short-circuit	Instant cutoff	Critical for 769Wh pack
🌡️ Over-temperature	65°C cutoff	Thermal protection
🔁 Auto-recovery	After fault cleared	Field-friendly
📊 Smart BMS	UART / CAN / SOC	Real-time state monitoring

⚠️ IATA Shipping Notice

Parameter	Value
Energy	769.6Wh
IATA passenger limit	160Wh
IATA cargo limit	160Wh (Section IA)
Air freight status	❌ Not permitted
Recommended shipping	🚢 Sea freight only
UN38.3 docs	✅ Included
IMDG class	Class 9 Hazmat

🚢 At 769.6Wh, this pack far exceeds all IATA air freight limits. Sea freight is mandatory. We provide complete UN38.3 certification, MSDS, Class 9 IMDG documentation, and DG packaging guidance for fully compliant maritime shipment. Typical sea freight transit: 15~35 days depending on destination.

Applications

Industry	Device	Why 10S8P
🚲 E-bike	Long-range electric bikes, cargo e-bikes	37V standard, 20Ah extreme range
🛵 E-mobility	High-power electric scooters, mobility vehicles	41.6A continuous, strong torque
🏭 AGV	Heavy warehouse AGV, autonomous forklifts	8+ hour runtime per charge
🤖 Robotics	Large industrial robots, autonomous machines	Stable 37V, massive energy reserve
⚡ Power Station	700Wh+ portable power stations	Near 1kWh in single pack
☀️ Solar Storage	Off-grid solar systems, backup power	Long cycle life, stable discharge
🚢 Marine	Electric boat motors, marine auxiliary power	High Ah for long waterway runs
🔧 Heavy Tools	Professional high-power equipment	Peak 104A for demanding loads

Charging Guide

Mode	Current	Time	Notes
0.5C Standard	10.4A	≈ 2h	✅ Best cycle life
1C Normal	20.8A	≈ 65min	✅ Daily use
2C Fast	41.6A	≈ 32min	⚠️ Occasional only
Storage mode	10.4A → 38.0V	—	✅ >3 days storage

⚠️ Requires 42V / 10S balance charger rated at ≥15A output. Dedicated high-current charger mandatory. Standard e-bike chargers (2A) will take 10+ hours for this pack.

Connector Reference

Connector	Current Rating	Suitability
Anderson SB175 ✅ Default	175A	✅ Heavy AGV, industrial
XT90	90A continuous	✅ E-bike, mid AGV
XT150	150A	✅ High-power EV
Anderson SB50	50A	⚠️ Undersized for peak
XT60	60A	⚠️ Undersized for 4C+

📌 At 83.2A continuous / 104A peak, Anderson SB175 is strongly recommended as default connector. XT90 acceptable for applications not exceeding 90A.

Cell Matching & Quality Control

QC Process	Standard
Capacity grading	All 80 cells matched within ±10mAh
Internal resistance	All cells matched within ±5mΩ
Voltage matching	All cells pre-charged to same voltage ±5mV
Formation cycling	Each cell cycled before assembly
Pack capacity test	100% discharge test before shipment
BMS balance check	Pack balanced to <5mV string delta

🔬 80-cell packs require rigorous cell matching — unmatched cells accelerate degradation and reduce cycle life. Our in-house grading process ensures maximum pack longevity.

Default Package Configuration

Item	Specification
Pack	18650 10S8P 37V 20800mAh
Cells	80× Grade A 18650 2600mAh
BMS	✅ Smart BMS, 80-cell balancing
Discharge connector	Anderson SB175
Balance connector	JST-XH 11Pin (10S)
Wire gauge	AWG8
Wire length	250mm
Housing	ABS hard case (standard)
Nickel strip	0.15mm × 8P bus bar
Label	Standard / OEM white-label

OEM / Custom Options

Option	Details
Capacity	17600 / 20800 / 24000 / 27200 / 28000mAh
Config	10S4P / 10S6P / 10S8P / 10S10P
Cell brand	Grade A / Grade A+ (Samsung / LG on request)
Connector	Anderson SB175 / XT90 / XT150 / custom
Smart BMS	CAN bus / RS485 / UART / SOC display
Housing	ABS / Aluminum / waterproof IP65 enclosure
Wire gauge	AWG6 ~ AWG10
Certification	CE, UN38.3, RoHS, IEC62133, UN38.3
Branding	OEM / white-label / custom enclosure print
MOQ	5 pcs

🔋 Premium cell upgrade: Samsung 25R / 30Q or LG MJ1 / M50 cells available on request for higher cycle life and discharge rate applications.

Certification & Compliance

Certificate	Scope	Status
✅ CE	EU market	Standard
✅ UN38.3	Sea freight DG	Standard
✅ RoHS	Substance compliance	Standard
✅ MSDS	Safety data sheet	Standard
✅ IMDG Class 9	Maritime DG	Standard
📋 IEC 62133	Battery safety	On request
📋 UL 2054	US market	On request
📋 UN38.3 test report	Full test data	On request

Why Choose Us?

🏭 Factory Direct — own large-format pack assembly, zero intermediaries
🔬 80-cell grade matching — capacity / IR / voltage matched within tight tolerance
⚖️ Smart BMS standard — 80-cell balancing, SOC reporting, fault logging
🚢 Sea freight specialists — full IMDG Class 9 DG documentation package
📐 Full 10S ladder — 10S1P to 10S10P from same factory
🔋 Premium cell options — Samsung / LG upgrade available
📋 CE + UN38.3 ready — all documentation included
🛠️ End-to-end OEM — from cell grading to certified mass production

📩 Planning a high-capacity 37V system? Share your motor power, runtime requirement & enclosure constraints — we’ll engineer the optimal 10S configuration within 24 hours.

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18650 10S8P Battery Pack 37V 20800mAh 20.8Ah Large Capacity Li-ion for E-bike Electric Scooter AGV Solar Storage Portable Power Station | CE UN38.3 | OEM Factory Direct

🔋 18650 10S8P Battery Pack — 37V 20800mAh 20.8Ah Large Capacity Li-ion Pack

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