High-Capacity 21700 Lithium-Ion Battery – Reliable & Long-Lasting Power
Premium 3.7V lithium-ion battery with superior energy density, available in 4000mAh (4Ah) or 5000mAh (5Ah) options for extended runtime. Advanced Li-ion technology ensures stable voltage output, low self-discharge, and 500+ charge cycles for long-term performance. Precision-welded terminals and robust steel casing enhance durability, while built-in PTC protection prevents overcharge and short circuits. Ideal for high-drain devices: flashlights, vaping mods, power tools, solar storage, and DIY electronics projects. Global wholesale pricing – bulk discounts available for resellers and industrial buyers. Stock up on premium batteries at unbeatable rates.