Li-ion

VTC INR21700-1S4P 3.6V 20.8Ah Li-ion Battery Pack for Industrial Instruments, IoT Gateways, Security Equipment

Parameter	Specification
Model	VTC INR21700-1S4P
Battery Type	Cylindrical Lithium-ion Rechargeable Battery Pack
Configuration	1S4P
Nominal Voltage	3.6V
Nominal Capacity	20.8Ah, discharge at 0.2C to 2.5V
Rapid Charging Current	0.3C (6.24A)
Standard Discharging Current	0.1C (2.08A)
Weight	300g
Pack Dimensions	456075mm MAX.
Cycle Life	≥500 cycles to 70% capacity at 0.2C charge
Protection IC	R5478N101CD
MOSFET	dp8205, 2 pcs

CB, CE, UL, UN38.3, MSDS, IEC61000, IEC62133, EU2023/1542

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Product overview

VTC-INR21700-3S5P 11.1V 25Ah Cylindrical Li-ion Rechargeable Battery Pack Manufacturer in China | Battery Manufacturers in China & Battery Supply Factory

The VTC INR21700-1S4P is a 3.6V 20.8Ah cylindrical Li-ion rechargeable battery pack built from a 1S4P 21700 cell configuration for equipment that needs higher single-cell capacity in a compact pack format. The datasheet specifies 20.8Ah nominal capacity, 20.4Ah minimum capacity, 4.2V maximum charge voltage, 2.5V discharge cut-off voltage, 0.1C standard charge/discharge current, 0.3C rapid charge and maximum discharge current, internal impedance of no more than 100mOhm, and maximum dimensions of 45*60*75mm. The pack includes PCM protection using an R5478N101CD protection IC and two dp8205 MOSFETs, with over-charge, over-discharge, over-current, and short-circuit protection parameters defined in the source specification. VTCBATT can supply this Li-ion battery pack for factory-direct projects with connector matching, wire configuration, labeling, sample testing, OEM/ODM development, wholesale orders, and stable batch production support based on the customer device structure.

01

Connector-Ready OEM Assembly

Lead wires and a connector-ready structure make the pack practical for OEM enclosure integration and sample development.

02

High-Capacity 1S4P Power Pack

20.8Ah nominal capacity in a 1S4P 21700 pack format supports longer runtime for compatible low-voltage equipment.

03

Integrated Protection Circuit

The datasheet defines PCM protection using an R5478N101CD protection IC and two dp8205 MOSFETs for pack-level electrical protection functions.

04

Stable Operation Across Temperatures

The source specification defines charge operation from 0°C to 45°C and discharge operation from -20°C to 60°C with current limits by temperature range.

Technical insight

Product and application details

connector-matched battery pack assemblies

Its compact 45x60x75mm dimensions fit snugly into tight internal spaces of industrial control units.

custom enclosure power modules

The 300g weight and 20.8Ah capacity provide substantial energy density for portable monitoring terminals.

Industrial control backup packs

A 500-cycle lifespan ensures long-term reliability for critical smart lighting control systems.

IoT gateway backup power

The 3.6V nominal voltage aligns perfectly with standard logic levels in IoT gateway circuits.

Portable medical support instruments

Supports a 0.1C discharge rate, maintaining stable power delivery for sensitive monitoring devices.

Portable monitoring terminals

The 1S4P configuration balances high current delivery with safe operating temperatures during peak usage.

Smart lighting control modules

Integrated protection ICs prevent over-discharge, extending operational life in intermittent smart security setups.

Smart security equipment

Rapid 0.3C charging capability minimizes downtime between security alerts and system reactivation.

The VTC INR21700-1S4P is a 3.6V 20.8Ah cylindrical Li-ion rechargeable battery pack built from a 1S4P 21700 cell configuration for equipment that needs higher single-cell capacity in a compact pack format. The datasheet specifies 20.8Ah nominal capacity, 20.4Ah minimum capacity, 4.2V maximum charge voltage, 2.5V discharge cut-off voltage, 0.1C standard charge/discharge current, 0.3C rapid charge and maximum discharge current, internal impedance of no more than 100mOhm, and maximum dimensions of 45*60*75mm. The pack includes PCM protection using an R5478N101CD protection IC and two dp8205 MOSFETs, with over-charge, over-discharge, over-current, and short-circuit protection parameters defined in the source specification. VTCBATT can

The VTC INR21700-1S4P is a 3.6V 20.8Ah cylindrical Li-ion rechargeable battery pack built from a 1S4P 21700 cell configuration for equipment that needs higher single-cell capacity in a compact pack format. The datasheet specifies 20.8Ah nominal capacity, 20.4Ah minimum capacity, 4.2V maximum charge voltage, 2.5V discharge cut-off voltage, 0.1C standard charge/discharge current, 0.3C rapid charge and maximum discharge current, internal impedance of no more than 100mOhm, and maximum dimensions of 45*60*75mm. The pack includes PCM protection using an R5478N101CD protection IC and two dp8205 MOSFETs, with over-charge, over-discharge, over-current, and short-circuit protection parameters defined in the source specification. VTCBATT can supply this Li-ion battery pack for factory-direct projects with connector matching, wire configuration, labeling, sample testing, OEM/ODM development, wholesale orders, and stable batch production support based on the customer device structure.

Factory capability

VTCBATT Production and Service

VTCBATT not only focuses on customized design and excellent service to meet the diverse demands of different customers, but also devotes itself to precise and standardized manufacturing in every process to ensure the highest-quality batteries. Meanwhile, VTCBATT provides comprehensive support from pre-sales to after-sales, focusing on customer feedback to establish long-term and win-win cooperation. VTCBATT professional sales and technical engineer teams will be your custom battery experts for reliable and responsive project support.

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Modern Manufacturing

From raw materials mixing to cell testing, VTCBATT adopts automated manufacturing processes to improve production efficiency and battery quality, safety, and reliability. The manufacturing process is monitored and tested before material moves to the next procedure.

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Trusted by Global Customers

Over the past 20 years, VTCBATT has built partnerships with customers in more than 50 countries. Reliable quality, responsive service, and tailored battery solutions support long-term cooperation with equipment manufacturers, distributors, and brands.