Key Features
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35A True Continuous Discharge – Delivers massive, stable power for high-drain devices. Handles sub-ohm power tool start-up surges, and RC motor bursts without voltage sag.
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Ultra-Low Internal Resistance (≤18mΩ) – Minimizes heat generation and energy loss, ensuring maximum power reaches your device even under extreme loads.
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2800mAh Balanced Capacity – Optimized for high-drain use; enough runtime for demanding tools and mods without sacrificing peak current capability.
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Flat Top Design – Compatible with all standard 18650 spring-contact devices, flashlights, and chargers. Ideal for DIY pack builders spot-welding nickel strips.
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Unprotected Cell – No built-in protection circuit, allowing unrestricted current flow for high-power applications. Always use an external BMS when building multi-cell packs.
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4-Pack Convenience – Perfect quantity for dual-battery mods, replacing power tool cells, or building small RC packs. Genuine Molicel quality in every cell.
Parameters
Applications
Recommended For (High-Drain Devices)
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Cordless Power Tools: Drills, impact drivers, wrenches, and circular saws for battery pack rebuilds.
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RC Models: Cars, trucks, boats, and quadcopters requiring instant high current bursts.
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Airsoft AEGs: High rate-of-fire electric guns.
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High-Output Flashlights: Direct-drive FET or multi-emitter hot-rod lights demanding 30A+.
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DIY Battery Packs: Spot welders, portable power stations, and custom high-current projects.
Not Recommended For
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Long-runtime low-drain devices (solar lights, sensors, clocks) – choose 3500mAh high-capacity cells.
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Standard USB power banks (5V/2A) – 35A capability is wasted; choose higher capacity cells.
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Devices requiring button top cells (use a magnetic spacer if necessary).
FAQ
Q: What does "Unprotected" mean and is it safe?
A: Unprotected means the cell does not have a built-in protection circuit board. This allows maximum current flow without restriction, which is essential for high-drain applications. You must rely on your device's protection features (for single-cell use) or install an external BMS (for multi-cell packs). Never short-circuit or over-discharge unprotected cells.
Q: Is 2800mAh enough? I see 3000mAh and 3500mAh cells.
A: 2800mAh is the ideal capacity for high-drain cells. The P28A trades a small amount of capacity (compared to 3000mAh) for extremely low internal resistance and a true 35A rating. For high-power devices, consistent voltage under load is far more important than a few hundred extra mAh. For low-drain, long-runtime devices, choose a 3500mAh cell instead.
Q: Can I rebuild my drill's battery pack with these?
A: Absolutely. The P28A is excellent for rebuilding power tool packs. Ensure all cells are matched (voltage and internal resistance). Spot-weld nickel strips — never solder directly to the cell — and install a BMS rated for at least 40A.
Q: How should I charge and store these cells?
A: Use a quality Li-ion charger with CC-CV algorithm. Charge at 0.5C (1.4A) for best longevity. Store in a non-conductive case at 3.6-3.7V (about 40% charge) in a cool, dry place. Never store fully charged or fully discharged for extended periods.
