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USB-C Direct Charging
We put the intelligence of a charger directly into the battery.
✅Supports 5V 1.2A fast charging.
✅Smart 3-stage charging algorithm for longer battery life.
✅Auto-activates and begins charging upon plugging in if
over-discharged.
It’s more than rechargeable. It is self-managed.
· A full charge via the USB-C cable takes 4.6 hours.
· Supports charging with 3.6V lithium battery chargers like the XTAR VX4, fully charging in 3 hours.
USB-C Direct Charging
We put the intelligence of a charger directly into the battery.
✅Supports 5V 1.2A fast charging.
✅Smart 3-stage charging algorithm for longer battery life.
✅Auto-activates and begins charging upon plugging in if over-discharged.
It’s more than rechargeable. It is self-managed.
· A full charge via the USB-C cable takes 4.6 hours.
· Supports charging with 3.6V lithium battery chargers like the XTAR VX4, fully charging in 3 hours.
Standard 21700 Size, No Fit Problems
Unlike many other USB-C 21700 batteries are too long to fit flashlights and gear, XTAR’s battery works well with standard battery compartments.
Standard 21700 Size, No Fit Problems
Unlike many other USB-C 21700 batteries are too long to fit flashlights and gear, XTAR’s battery works well with standard battery compartments.
5000mAh & 10A High Performance
5000mAh high capacity with up to 10A discharge. Delivers stable power without overheating — consistent performance from start to finish.
5000mAh & 10A High Performance
5000mAh high capacity with up to 10A discharge. Delivers stable power without overheating — consistent performance from start to finish.
800 Cycles — Long Life, Low Waste
That means fewer replacements, lower cost in the long run, and less environmental impact.
800 Cycles — Long Life, Low Waste
That means fewer replacements, lower cost in the long run, and less environmental impact.
Excellent Performance in Extreme Temperature
Supporting a wide range of -20°C to 60°C, it is perfect for temperature-sensitive equipment such as outdoor weather stations.
Excellent Performance in
Extreme Temperature
Supporting a wide range of -20°C to 60°C, it is perfect for temperature-sensitive equipment such as outdoor weather stations.
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Multiple Layers of Protection
Built-In explosion-proof valve, designed to prevent leakage, swelling and even rupture under extreme conditions.
Equipped with XTAR’s own protection board for consistent performance and safer use.
Over-Charge Test
Over-Discharge Test
Short Circuit Test
Vibration Test
Drop Test
Safety Test
Multiple Layers of Protection
Built-In explosion-proof valve, designed to prevent leakage, swelling and even rupture under extreme conditions.
Equipped with XTAR’s own protection board for consistent performance and safer use.
Over-Charge Test
Over-Discharge Test
Short Circuit Test
Vibration Test
Drop Test
Safety Test
Balanced Cell for Multi-Battery Devices
In devices using 2 or more batteries, imbalance can ruin performance. XTAR carefully tests and selects the cell capacity and internal resistance. Each cell in a batch performs consistently, avoids runtime gaps and uneven drainage. This type of quality control often goes unnoticed — but it makes all the difference.
Balanced Cell for Multi-Battery Devices
In devices using 2 or more batteries, imbalance can ruin performance. XTAR carefully tests and selects the cell capacity and internal resistance. Each cell in a batch performs consistently, avoids runtime gaps and uneven drainage. This type of quality control often goes unnoticed — but it makes all the difference.
Made for Flashlights, Ready for More
Ideal for EDC/tactical/diving flashlights, bike lights, outdoor weather station, and other 21700-powered gear.
Made for Flashlights, Ready for More
Ideal for EDC/tactical/diving flashlights, bike lights, outdoor weather station, and other 21700-powered gear.
Specifications
Model | 21700 USB-C Li-ion Battery |
Capacity | 5000mAh |
Voltage | 3.6V |
Max Discharge Current | 10A |
Charging Voltage | 4.2±0.03V |
Charging Current | 2500mA |
Operating Temp. | -20-60℃ |
Storage Temp. | -20-55℃(Best at 25±5℃) |
Cycle Life | 800＋ |
Protected | Yes |
Positive Terminal | Flat Top |
Dimensions(mm) | φ21.5±0.3 x H75.5±0.5 |
Net Weight(g) | 73 |
Package
Package
