Apsenx 21700 Lithium Battery 5000mAh High Capacity

If you need a compact battery that delivers real, stable power, this 21700 lithium cell is built for that. It uses A-grade materials with full capacity, so the performance stays consistent instead of fading halfway through the cycle. The discharge voltage remains steady as well, which means your devices work smoothly even when the load changes. From the first charge, you can feel the difference in stability and reliability.

What also sets this battery apart is its internal structure. The high-density ternary material gives it a strong, clean output, while the precise winding and stacking process keeps internal resistance low. Because of this, the battery runs more efficiently and maintains a longer cycle life. Self-discharge stays low too, so it won’t lose much energy when stored. And with built-in protection against short circuits, overpower, overcurrent, overvoltage and temperature spikes, the battery stays safe under real-world use.

With a true 5000mAh at 3.7V, this cell fits perfectly into devices that need both endurance and stability—power banks, flashlights, tool packs, e-mobility accessories and other electronics. It performs predictably whether you’re drawing light power for long runtimes or higher output for short bursts. Because our production follows strict consistency matching and quality checks, each batch stays aligned in capacity and performance, making it reliable for long-term or large-scale integration.

If you need customization, we make it straightforward. You can choose the discharge interface, wire length or connector type according to your device design. Branding or packaging customization is also available for OEM and wholesale projects. Many clients prefer this model because it integrates easily and avoids the unpredictable issues often found in lower-grade cells. If you’re preparing a product upgrade or a new project, feel free to contact us for samples, custom solutions or a tailored quote.

21700 3.7V 5000mAh Battery Cell Features

High Capacity Power

This 5000mAh cell simply delivers more runtime—no magic, just solid capacity—and it holds its voltage better under load. Flashlights, tools, any high-drain gear feel more stable and don’t fade out as quickly.

Reliable & Stable

The discharge curve is smooth and predictable, so you don’t get those sudden drops. Each batch is matched for capacity and voltage, which keeps performance consistent when you’re using multiple cells in a pack or device.

Safety-Focused Design

Safety is pretty well handled here with multiple protection layers to avoid heat spikes or current surges. Materials and production standards are tight, so overall stability is something you don’t really have to worry about.

Custom Ready

If you need different capacities, wire lengths, or connector types, we can set it up exactly for your device. Anything from lower-capacity options up to full 5000mAh cells can be customized, and interfaces can be changed freely.

Durable Build

It holds up well over long-term daily use, with capacity drop staying slow and predictable. Self-discharge is low too—leave it sitting for a month or two and it still keeps most of its charge, which is always nice.

Wide Application Use

Whether it’s for flashlights, power banks, tools, or a full battery pack design, this cell fits easily into different setups. We support OEM and bulk supply, so it works for brands, custom projects, or commercial production.