Short Description
Go further between charges with the LG INR21700 M52V, a 5200mAh 21700 cell built for stamina. This 10-pack delivers a stable 7.5A continuous discharge, making it the perfect powerhouse for high-capacity power banks, long-throw LED flashlights, solar energy storage, wireless security cameras, and other devices that prioritize runtime over extreme current. The flat top design fits all standard 21700 spring-contact devices and simplifies spot-welding for custom battery packs. With industry-leading capacity and LG's trusted reliability, the M52V is the endurance cell you need for off-grid living, emergency preparedness, and everyday convenience.
Key Features
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5200mAh Ultra-High Capacity – One of the highest capacity 21700 cells on the market. Ideal for applications where maximum runtime is critical.
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7.5A Continuous Discharge – Provides steady, reliable power for medium-drain devices. Handles USB-C PD power banks, medium-to-high flashlight modes, and solar lighting with ease.
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Flat Top Design – Universally compatible with 21700 spring-contact chargers, battery holders, and flashlights. The flat positive terminal is perfect for spot-welding nickel strips in DIY packs.
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Exceptional Cycle Life – Retains over 80% capacity after 500 charge/discharge cycles under recommended conditions, reducing long-term ownership costs.
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Genuine LG Chem Quality – Manufactured in Korea with stringent safety and consistency standards. Trusted by professionals and enthusiasts worldwide.
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10-Pack Bulk Value – Ideal for building large power banks, refreshing solar storage arrays, or stocking up for multiple devices.
Parameters
Applications
Recommended For
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High-Capacity Power Banks: Build fast-charging 20,000mAh+ portable chargers with fewer cells and longer service intervals.
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LED Flashlights & Headlamps: Achieve exceptional runtimes on medium to high modes (1–6A draw). Perfect for search-and-rescue or night hiking.
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Solar Energy Storage: Solar street lights, garden lamps, and small off-grid systems benefit from the massive capacity and low self-discharge.
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Wireless Security Cameras & Video Doorbells: Months of standby with sufficient peak current for motion-activated recording.
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Portable Medical Devices: Infusion pumps, patient monitors, and diagnostic tools that require long, uninterrupted operation.
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IoT & Environmental Sensors: Remote nodes that need to run unattended for extended periods.
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Camping & Emergency Lanterns: Reliable light source for extended trips and power outages.
Not Recommended For
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High-Drain Applications: Power tools (drills, saws, angle grinders), sub-ohm vaping, and RC models require 15A+ continuous current. Use dedicated high-drain cells (e.g., Samsung 40T, Molicel P42A).
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Ultra-High Turbo Flashlights: If your light’s turbo mode pulls over 7.5A, choose a higher-discharge cell to avoid voltage sag and potential overheating.
FAQ
Q: Is this battery suitable for building a USB-C PD power bank?
A: Absolutely. With 5200mAh capacity and 7.5A continuous discharge, even a 3-cell parallel configuration can easily support 100W PD output while providing over 15,000mAh of energy. The M52V is one of the best cells for this application.
Q: What makes the M52V an “endurance cell”?
A: Its 5200mAh capacity is among the highest available in a 21700 cell. Combined with low self-discharge and excellent cycle life, it is designed to keep your devices running as long as possible between charges. It sacrifices high-rate capability for maximum energy density.
Q: Do I need a protection circuit when building a multi-cell pack?
A: Yes. When connecting cells in series or parallel, always use a BMS (Battery Management System) rated appropriately for your pack’s total voltage and current. This protects against overcharge, over-discharge, and cell imbalance.
Q: How should I store these cells long-term?
A: Store at 3.6–3.7V (approximately 40–50% charge) in a cool, dry place. Use non-conductive cases to prevent accidental shorts. Avoid storing fully charged or deeply discharged for extended periods.
