11.1V 5200mAh 6 Cell 18650 Lithium Ion Battery Pack - High Capacity

In this review the focus is on a practical replacement battery pack for devices that need an 11V to 12V supply. The 11.1V 5200mAh 6 cell 18650 lithium ion pack stands out for its higher capacity and heavier gauge wiring compared with many cheap alternatives, making it a solid choice for hobby electronics, cameras, speakers and pool vac replacements that demand longer run time. The single biggest reason to buy is the combination of a true 5200mAh capacity with an installed IC protection chip that prevents overcharge and overdischarge, preserving chemistry integrity.

Key Features

• 5200mAh capacity: Provides extended run time compared with lower capacity packs, useful for devices that run for hours between charges.
• 11.1V working voltage: Matches devices that require an 11V to 12V supply, avoiding the need for step-up modules in most applications.
• Integrated protection IC: Prevents overcharge and overdischarge to extend battery life and protect connected equipment from damage.
• Heavy duty 18 gauge wire: Thicker wiring reduces voltage drop under load and is more durable for installations that see movement or frequent reconnection.
• Pre-tipped connector options: Ships with a female 2-pin MTA-100 connector preinstalled and a loose male connector so users can adapt connection style to their device.
• Cylindrical 18650 cells: Uses common high energy density cells that balance capacity and weight for tighter electronics projects.

Who It's For

This pack is aimed at hobbyists, camera accessory users, small appliance repairs and anyone replacing an 11V pack in devices such as speakers, small pool vacuums and portable electronics. Its higher capacity and protection circuitry make it suitable for users who want dependable run time without modifying device charging systems.

It is less suitable for very small or weight-sensitive handheld gadgets where the heavier build and greater mass are drawbacks, or for devices that strictly require a different connector type without modification. Users unsure about connector wiring should consult a technician before installation.

Pros & Cons

Pros

• Higher 5200mAh capacity gives noticeably longer operation between charges for compatible devices.
• Protection IC reduces risk of overcharge and overdischarge, helping longevity and safety.
• Sturdy 18 gauge leads and supplied connectors simplify installation and lower voltage loss under load.

Cons

• Heavier build than low-cost light weight packs, so not ideal where minimal weight is critical.
• Connector is a 2 pin MTA-100 female by default, which may require minor wiring or connector changes for some devices.

Specifications

Chemistry	Lithium Ion (Li-Ion)
Nominal Voltage	11.1V
Capacity	5200 mAh (57.72 Wh)
Cell Type	6 x 18650 cylindrical cells
Connector	Female 2POS.100 MTA-100 / includes loose 2 pin male
Dimensions	69mm x 57mm x 18mm
Standard Charge / Discharge	2.5 A charge / 4 A discharge (max 7 A)

Our Verdict

This 11.1V 5200mAh 6 cell 18650 pack is a sensible replacement for users who need longer runtime and reliable protection circuitry without redesigning their device. It offers good value for projects and replacement applications where weight is secondary to capacity and durability, and the included connectors plus heavy gauge wiring make installation straightforward for most hobby and repair use cases.

Frequently Asked Questions

Can I use this pack in a device that expects 12V?
The pack nominally supplies 11.1V and charges to 12.6V, so it is suitable for many 11V to 12V devices but confirm the device tolerance before use.

Does the pack include overcharge protection?
Yes, an installed IC chip prevents overcharge and overdischarge to help protect the battery chemistry and prolong life.

What if my device uses a different connector?
The pack allows removal of the connector and includes a loose male connector, so you can rewire or install a matching connector for your device.