Product Description
32A. 4000mAh. 70mm Flat Top. Done.
You don't need a story. You need a battery that delivers. This 2‑pack of 21700 cells puts exactly what matters on the table: 32 amps of continuous current, 4000mAh capacity, and a flat‑top form factor that fits every serious 21700 device. No exaggerated pulse ratings disguised as continuous. No button tops that won't fit your tube. Just honest, brutal power in a standard 70.0mm × 21.4mm cylinder.
What This Cell Is (and Isn't)
This is a high‑drain cell for high‑drain applications. Turbo flashlights that pull 20–30A. RC cars and drones that demand instant throttle response. Cordless drills and impact drivers that need startup torque. It is NOT a low‑current energy cell for headlamps or doorbells. If your device doesn't hit at least 10A regularly, you're better off with a higher capacity, lower drain option. If it does, you've found your battery.
Why Numbers Matter
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32A Continuous — verified, not inflated. At 32A, voltage drop is minimal thanks to ≤18mΩ internal resistance. Your light stays bright, your motor keeps torque.
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4000mAh Capacity — 14.8Wh per cell. Enough to run a turbo flashlight for solid bursts, not seconds. Enough to finish a 10‑minute RC heat. Enough to drive hundreds of screws per charge.
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70.0mm × 21.4mm — industry‑standard 21700 flat top. Drops into any device designed for unprotected flat‑top cells. No spacers, no modifications.
Unprotected Flat Top — Know Your Gear
This is a bare cell. No protection PCB. No button. You provide the 4.2V charger and the device with low‑voltage cutoff. In return, you get the shortest possible length, the lowest possible resistance, and zero current bottlenecks. The cell itself handles over‑current, over‑pressure, and short circuits via built‑in PTC, vent, and CID. If you're not comfortable with unprotected cells, stop here. If you are, this is the cleanest power you can get.
2‑Pack = Flexibility
Build a 2S pack. Swap on the fly. Keep a spare in your bag. Two cells give you options without locking you into a case quantity you don't need.
Key Features
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⚡ 32A Continuous Discharge — verified, sustained, no voltage collapse.
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🔋 4000mAh Real Capacity — 14.8Wh per cell. Runtime that counts.
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📏 Standard 21700 Flat Top — 70.0mm × 21.4mm. No button, no PCB.
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📉 ≤18mΩ Internal Resistance — minimal sag, maximum efficiency.
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♻️ 500+ Cycles — to 70% capacity under standard conditions.
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🛡️ Passive Safety — PTC, safety vent, CID.
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🔧 2‑Pack — build, swap, backup.
Technical Parameters
Applications
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🔦 Turbo Flashlights – FET drivers, multi‑emitter builds, SBT90.2 hot‑rods.
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🚁 RC Cars & Drones – 2S/3S racing packs, 1/8 scale truggies, FPV quads.
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🔧 Power Tool Rebuilds – 18V/20V drills, impacts, circular saws.
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🔌 DIY High‑Current Projects – Power banks, inverters, portable workstations.
FAQ
Q: 32A continuous — real?
A: Real. Verified. No marketing fluff.
Q: Why unprotected flat top?
A: Shortest length, lowest resistance. Fits all 21700 high‑drain devices. Use a 4.2V charger and a device with low‑voltage cutoff. The cell has built‑in PTC, vent, CID.
Q: Will this fit my 18650 light?
A: No. 21700 is larger. Your device must say "21700".
Q: Button top needed?
A: Most high‑performance devices want flat tops. If your device has a spring with a ring blocking a flat top, you need a button top. Check your manual.
Q: Storage?
A: ~3.6–3.7V (50% charge) in a plastic case. Check every 3 months.
Q: Air travel?
A: Yes. 14.8Wh per cell, well under the 100Wh limit. Carry‑on, terminals insulated.
