📝 Description
⚡ 21700 LiFePO4 3000mAh 3.2V 3C – The High‑Discharge Cell That Takes Your Solar & 12V/24V Projects to the Next Level!
When your solar storage or DIY battery pack demands real current on demand, the 21700 3.2V 3000mAh 3C LiFePO4 cell steps up. This isn’t a slow‑and‑steady energy cell; it’s a high‑discharge workhorse that pours out a continuous 9 amps (3C) and bursts up to 15 amps (5C) — enough to start a 12V water pump, ride out an inverter surge, or keep a 24V LED floodlight blazing without a flicker of voltage sag. And it does all this while delivering the absolute safety and brutal longevity that only lithium iron phosphate can offer.
🔋 Each cell packs a genuine 3,000mAh (9.6Wh) at a rock‑steady 3.2V nominal. Stack four in series and you instantly have a 12.8V 3Ah (38.4Wh) compact battery — the perfect size for a small solar garden light array, a portable router UPS, or a lightweight camping power box. String eight together for a 25.6V 3Ah (76.8Wh) pack that drives 24V inverters, 3D printers, or industrial sensors. With the 3C discharge rating, you can pull 9A continuously from even a single 4S string — no need to parallel a dozen cells just to start your equipment.
🛡️ LiFePO4 is the only lithium chemistry that’s truly non‑explosive, non‑toxic, and immune to thermal runaway. Build your battery into a wooden cabinet, a plastic toolbox, or your vehicle’s storage bay — it will never catch fire, vent gas, or leak acid. And with ≥2,000 deep‑cycle lifespan (to 80% capacity), this cell will still be delivering dependable power years after you’ve replaced your inverter and charge controller. Daily cycling for five years? Easy. Weekend use for a decade? No sweat.
⚙️ Every cell is a grade‑A, factory‑fresh unit with voltage and internal resistance rigorously matched before shipping. The flat‑top positive terminal is spot‑weld ready, and the robust nickel‑plated steel can is laser‑sealed against moisture and vibration. The ultra‑low internal resistance — typically ≤28mΩ — minimizes heat and voltage drop even when you flog it at the full 9A rate, keeping your system efficient and your pack healthy.
🌍 From a 12V shed‑light battery that sips solar, to a 24V ham radio field pack, to a 48V powerwall built tier by tier — this 21700 3C cell is the flexible, high‑power building block you’ve been needing. Stop over‑sizing lead‑acid, stop nursing NiMH, and start building the safe, long‑life lithium system you’ve been planning.
⭐ Key Features
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⚡ 3C Continuous Discharge (9A) / 5C Pulse (15A) – True high‑rate lithium iron phosphate. Each cell delivers a full 9 amps continuous; bursts of 15 amps handle motor start‑up and inverter surges without voltage collapse.
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🔋 Genuine 3000mAh Capacity – Nominal 3.2V, 9.6Wh per cell. Build a 4S 12.8V 3Ah (38.4Wh) or 8S 25.6V 3Ah (76.8Wh) pack with just a handful of cells — perfect for compact solar and backup systems.
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🔄 2,000+ Ultra‑Deep Cycle Life – Retains ≥80% capacity after 2,000 full depth‑of‑discharge cycles. That’s over 5 years of daily cycling or a decade of part‑time use — dramatically outlasting lead‑acid and NiMH.
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🛡️ Inherent LiFePO₄ Safety – No fire, no explosion, no toxic fumes. The only lithium chemistry you can confidently install indoors, in your vehicle, or in children’s educational projects.
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📉 Ultra‑Low Internal Resistance ≤28mΩ – Minimised heat generation and voltage sag, even under full 3C load. More stored energy goes to your appliances, not wasted as heat.
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🏅 100% Grade A Cells – Each cell is factory‑matched for voltage and internal resistance, with zero cycles and laser‑etched model codes. No B‑stock, no used pulls — only consistent, reliable power.
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📏 Standard 21700 Format – 21.5mm diameter × 70mm height. Fits all 21700 battery holders, plastic spacers, and shrink‑wrap jigs. Offers ~25% more volume than an 18650 for better heat dissipation and capacity.
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🔩 Flat‑Top Terminal – DIY Ready – Clean positive terminal designed for spot‑welding nickel strips, soldering tabs, or pressing into spring‑loaded 21700 sleds. Build your pack your way.
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🌡️ All‑Climate Operation – Discharge from -20°C to 60°C, charge from 0°C to 55°C. Reliably powers your gear in freezing winters and blazing summers.
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🧩 Modular & Stackable – Combine in series for 12V, 24V, 48V systems; parallel for more capacity. The 3C rating gives you both current and flexibility.
📊 Parameters
🎯 Applications
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☀️ DIY 12V Solar Storage – A 4S pack gives you 12.8V 3Ah; add parallel strings to build a 12V 15Ah or 30Ah bank. Perfect for solar garden lights, security cameras, and small off‑grid cabins.
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⚡ 24V Backup & Inverter Systems – An 8S configuration provides 25.6V 3Ah, ideal for 24V inverters, 3D printers, ham radios, and server backup. High current delivery keeps your gear running smoothly.
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🚐 RV & Camper Auxiliary Power – Replace heavy lead‑acid with a lightweight 12.8V LFP pack for interior LEDs, water pumps, and 12V fridges. Safe to install inside without venting concerns.
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🛑 Home Office UPS – Keep your router, modem, and VoIP phone online during blackouts with a compact 12.8V battery box. The 3C discharge easily handles the startup surge of networking gear.
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🔧 Portable Power Stations & Solar Generators – Build a silent, fume‑free power box with USB‑C PD, 12V cigarette socket, and an inverter. The high discharge rate supports power tools and small appliances.
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📡 Off‑Grid Sensors & IoT – Pair a single cell or a small 4S pack with a solar panel for year‑round remote monitoring of weather stations, water levels, or wildlife cameras.
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🚲 E‑Bike Accessory & Lighting Packs – Construct a dedicated 8S 24V battery for powerful LED headlights, horns, and display systems. Safe enough to charge inside your apartment.
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🎓 STEM Education & Makerspaces – The safest high‑discharge cell for university labs and DIY enthusiasts. Experiment with BMS design, pack building, and renewable energy storage without fire risk.
