It holds a charge well, recharges quickly, and delivers strong, reliable power every time.
E
Edmund Kelley
Battery
Best flash light I ever had
FAQ
Frequently asked questions
Q1: Is the 21700 battery safe to use?
Yes, our 21700 batteries come with a built-in protection board and are CE, FCC, MSDS, and UN38.3 certified for safe and reliable use.
Q2: How do I charge and maintain a 21700 battery?
Use a compatible charger designed for lithium-ion batteries. Avoid overcharging or exposing the battery to extreme heat, and store it in a cool, dry place when not in use.
Q3: How long does a 21700 battery last?
With proper use and charging, a 21700 battery can last for hundreds of charge cycles, providing long-lasting and reliable performance.
UltraFire Brand FAQ
Have questions? We’re here to help
Title
Q1: Do you really offer a three-year warranty?
A: Within 3 years of purchase, we provide after-sales service for any quality issues, including free repairs or replacements. Additional batteries, chargers, and purchased accessories are covered by a 1-year warranty.
A: Yes. Our checkout process uses encrypted, PCI-compliant payment systems. Your personal and payment information is always safe.
Q3: Do you really offer free shipping?
A: Yes! All orders ship free worldwide, with tracking included. No hidden fees.
Q4: How long does shipping take?
A: Shipping times vary by location. If your order is shipped from a local warehouse, delivery usually takes 2–5 days. For international shipping, most orders arrive within 7–15 business days. You’ll receive a tracking number once your order is on the way.
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