Look at capacity (mAh), energy density (Wh/kg or Wh/L), cycle life, charging speed, and safety features like overcharge/short-circuit protection.

It depends on the power consumption and expected working hours of your product. For example, wearable electronics may require 150–300mAh, while smart toys may need 500–1000mAh.

Very important. Higher energy density means longer runtime in a compact size. Choose ≥250 Wh/kg for premium wearables or medical devices.

Yes. We support 1C, 2C, and even 3C fast charging rates, depending on your product design and charger compatibility.

Yes, our products are certified with CE, UL, FCC, UN38.3, RoHS, and PSE. Each battery includes overcharge, overheat, and short-circuit protection.

Absolutely. We offer complete customization of battery size, capacity, and BMS (Battery Management System) to fit your device.

Our factory guarantees ≥98% yield rate. We perform 100% full inspections with ISO9001-certified processes, and provide batch testing reports for transparency.

We serve medical, cosmetic, consumer electronics, toys, pet electronics, and smart devices. We provide industry-specific advice for performance and safety.

Ask about fast charging support, safety certifications, delivery time, MOQ, customization ability, warranty, and real batch yield rates.

Yes, samples are available for testing. We can also arrange a factory tour (video or on-site) and show you real testing and production lines.