DMEGC INR21700-45E 4500mAh 3.7V 21700 Rechargeable Li-ion Battery – 13.5A Continuous for LED Flashlights, Fans, Cameras & Power Tools

The Versatile Performer: 4500mAh Capacity with 13.5A Muscle
The DMEGC INR21700-45E occupies a sweet spot in the 21700 lineup — it's not just a high-capacity cell, and it's not a pure high-drain monster. Instead, it intelligently balances a generous 4500mAh energy reserve with a robust 13.5A continuous discharge. This means you get the best of both worlds: longer runtimes than a 3000mAh power cell, and significantly more current capability than a 5000mAh energy cell. It’s the perfect power core for devices that need both endurance and punch — a turbo flashlight that runs for hours without dimming, a portable fan that keeps you cool through a work shift, a camera monitor that won’t die mid-shoot, or a cordless power tool that bites into material without stalling.

Unprotected Design — Raw Power, Maximum Compatibility
Like all high-performance cylindrical cells, the 45E is supplied as an unprotected bare cell. We intentionally leave off the external protection PCB to keep the cell’s length at the standard 70mm (flat top) and to reduce internal resistance. This ensures the cell slips effortlessly into any 21700-compatible flashlight tube, fan bay, camera adapter, or tool battery pack. Removing the PCB also eliminates an extra layer of electrical resistance, allowing the 13.5A to flow with minimal heat and virtually no voltage sag. Of course, this requires responsible handling: always use a quality charger that terminates at exactly 4.2V, and only install the cell in devices that have built-in low-voltage cutoff. Almost every modern LED flashlight, USB fan, camera accessory, and cordless tool already incorporates this protection, making them perfect partners for this bare cell.

Three Terminal Choices — One Perfect Fit
Because no single terminal style fits every gadget, we offer three distinct options so you can match your device exactly:

• Button Top: A raised positive nipple (~1.5mm) that locks securely into spring-loaded battery compartments and clears mechanical reverse-polarity guards. Ideal for many consumer flashlights, fan holders, and some tool adapters.

• Flat Top: A completely flush positive terminal. This is mandatory for ultra-tight flashlight tubes, pogo-pin contacts, and custom spot-welded battery packs. Many high-end lights (ZebraLight, Noctigon, etc.) and camera accessories specifically require flat tops.

• Nickel Tab: Both positive and negative ends come pre-welded with pure nickel strips, ready for soldering or additional spot welding. The turn-key solution for building DIY power tool packs, high-capacity power banks, or custom 2S/3S battery configurations.

Where 4500mAh and 13.5A Make the Difference
The 45E’s 4500mAh capacity stores about 16.7 watt-hours of energy — roughly 50% more than a standard 3000mAh 18650. In a high-performance LED flashlight, you can expect over 4 hours of 300-lumen light, or a full night on low mode. The 13.5A discharge easily feeds turbo modes up to 2000+ lumens without triggering premature step-down. A USB desk fan on low speed runs for 10–12 hours, and even on high speed the voltage stays consistent, so the breeze doesn’t weaken. For camera monitors and video lights, the cell handles the steady 1–3A draw with ease, while the generous capacity reduces battery swaps during long shoots. Cordless drills, impact drivers, and small saws also benefit: the 13.5A provides the startup surge these tools demand, and the 4500mAh gives you meaningful runtime before a pack swap.

Premium INR Chemistry for Reliability and Long Life
DMEGC’s INR formulation (Nickel-Manganese-Cobalt) delivers a stable 3.7V nominal voltage and a flat discharge curve, ensuring your devices perform consistently from fresh off the charger to nearly empty. With an internal resistance of ≤25mΩ, voltage sag is minimal — only about 0.34V at the full 13.5A load. The cell is rated for over 500 full charge/discharge cycles with ≥70% capacity retention. Low self-discharge means you can store a spare at 3.6–3.7V for months, and it will still be ready for action when the next blackout, camping trip, or DIY project calls. Built-in PTC thermistor, resealable safety vent, and CID provide multiple layers of passive protection against over-current, over-pressure, and short circuits. The nickel-plated steel can resists drops, corrosion, and the rigors of daily use.

Key Features

• Balanced 4500mAh + 13.5A Performance
  50% more energy than a 3000mAh cell, with enough current to handle turbo flashlights, power tools, and more — without voltage sag.

• Unprotected, Standard 70mm Form Factor
  Fits all 21700-compatible devices. Lower internal resistance means cooler operation and more power delivered to your device.

• Three Terminal Options: Button Top, Flat Top & Nickel Tab
  Button Top for spring-contact devices. Flat Top for tight tubes and pogo-pin hosts. Nickel Tab for ready-to-weld DIY packs. True compatibility across the 21700 ecosystem.

• Verified 13.5A Continuous Discharge
  Handles medium-high loads with ease. Can pulse even higher for instantaneous torque bursts in power tools or RC models.

• Stable INR (NMC) Chemistry
  Provides a flat 3.7V discharge curve, excellent thermal stability, and long cycle life — the trusted chemistry behind modern power tools and EVs.

• Low Internal Resistance (≤25mΩ)
  Voltage drop at 13.5A is only ~0.34V. Your devices stay in regulation longer, and your beams stay brighter.

• 500+ Cycle Life & Low Self-Discharge
  Recharge hundreds of times with minimal capacity loss. Stores for months without significant power drain — always ready when you need it.

• Multi-Layered Passive Safety
  Built-in PTC thermistor, resealable safety vent, and CID protect against over-temperature, over-pressure, and internal faults.

• Rugged Nickel-Plated Steel Can
  Corrosion-resistant and impact-resistant. Engineered for the vibrations and drops of power tools, outdoor use, and portable electronics.

Technical Parameters

Applications

1. High-Performance LED Flashlights
For flashlights that demand both runtime and current — think turbo modes on multi-emitter or FET-driven lights — the 45E is a dream. It feeds 10–13A without sag, keeping lumens high for longer. Flat top fits ultra-tight tubes; button top locks securely into spring-loaded hosts.

2. Portable Fans & Cooling Devices
USB desk fans, camping fans, and job-site fans run for 10–12 hours on low speed with this cell. The 13.5A capability means even high speed stays strong, and voltage doesn’t droop prematurely. The flat top is often required for recessed fan battery bays.

3. Camera Monitors, Video Lights & Accessories
External field monitors, LED panels, and camera battery adapters that accept 21700 cells benefit from the 4500mAh capacity and stable voltage. Fewer battery changes mean more uninterrupted shooting. Many camera accessories require flat-top cells.

4. Cordless Power Tools (Light to Medium Duty)
Rebuild a 12V or 18V drill battery with these 45E cells. The 13.5A continuous discharge handles the startup spikes of drills, impact drivers, and small saws, while the 4500mAh capacity provides decent runtime. Flat tops are ideal for spot-welding into 5S1P packs; nickel tab variants make assembly even faster.

5. Motorized Toys & Ride-On Vehicles
RC cars, robots, and children’s ride-on toys see dramatic runtime improvements with a 2S or 3S pack of 45E cells. The 13.5A output supports acceleration bursts without bogging down, and the capacity keeps the fun going longer.

6. DIY Battery Packs & Power Banks
The nickel tab option is purpose-built for spot-welders and makers. Build a 2S2P pack for a portable Bluetooth speaker, a 3S pack for a drone ground station, or a high-capacity USB-C power bank. The consistent 4500mAh capacity simplifies cell matching.

7. Portable Medical & Industrial Equipment
Handheld barcode scanners, portable nebulizers, and thermal printers that use 21700 power appreciate the combination of long runtime and reliable 13.5A output — ideal for devices that cycle between idle and active use.

FAQ

Q1: Is the DMEGC INR21700-45E really 13.5A continuous?
A: Yes. The 13.5A continuous rating is verified by DMEGC’s specifications. This cell bridges the gap between 10A energy cells (like 50E) and 35A high-drain cells (like 40T), offering a practical balance for users who need more current than a 10A cell but still want high capacity.

Q2: Why is this battery unprotected? Is it safe for my flashlight or tool?
A: Removing the protection PCB keeps the cell at the standard 70mm length and reduces internal resistance, which is crucial for efficient 13.5A operation. It’s completely safe when you use a quality 4.2V Li-ion charger and only install it in devices with built-in low-voltage cutoff — a standard feature in modern flashlights, fans, cameras, and power tools. The cell itself includes PTC, vent, and CID for passive safety.

Q3: Which terminal should I choose — Button Top, Flat Top, or Nickel Tab?
A: Button Top for devices with spring-loaded positive contacts and reverse-polarity rings. Flat Top for tight tubes, pogo-pin contacts, and devices that require a flush terminal. Nickel Tab if you’re building a spot-welded battery pack. Check your device manual or measure the battery compartment if unsure.

Q4: Can I use this battery in a device designed for 18650?
A: No. A 21700 cell (21mm diameter, 70mm length) is physically larger than an 18650 (18mm × 65mm). Your device must explicitly support 21700 batteries. Forcing a 21700 into an 18650 tube can cause damage.

Q5: How does the 45E compare to the Samsung 50E or EVE 50E?
A: The 50E cells are 5000mAh and rated for 10A continuous. The DMEGC 45E offers slightly less capacity (4500mAh) but a higher discharge rate (13.5A). Choose the 45E if your device needs that extra current headroom for brighter turbo modes or tool startup surges. Choose the 50E if maximum runtime at lower currents is your priority.

Q6: How long does it take to charge?
A: At the standard charge rate of 2.25A, a fully depleted 4500mAh cell charges in about 2.5 hours. Using a 1A charger will take roughly 5 hours. Always use a smart Li-ion charger with accurate 4.2V termination.

Q7: How should I store this cell when not in use?
A: Store it in a plastic battery case or silicone sleeve, away from metal objects and moisture. For storage longer than one month, bring the voltage to about 3.6–3.7V (roughly 50% charge). Check every 3 months and recharge if below 3.0V. Never store a fully depleted cell.

Q8: Can I bring this battery on an airplane?
A: Yes. At 16.65Wh, it’s well under the 100Wh IATA limit for carry-on luggage. Insulate the terminals and carry it in your hand luggage.

Q9: What charger should I use?
A: Any quality charger designed for 3.7V Li-ion cells with accurate 4.2V termination. Most modern chargers from brands like XTAR, Nitecore, and LiitoKala support 21700 cells. Ensure the charger bay can accommodate the 70mm length.