16500 lithium battery
16500 battery
battery 16500

3.7V 16500 1200mAh 3C Lithium Li Ion Battery Cell

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Summary of 16500 1200mAh 3C Li-ion Cylindrical Rechargeable Battery​

This is a compact 16500-format lithium‑ion cell engineered for space‑constrained devices that still require stable power, high safety margins, and reliable low‑temperature operation. It offers no memory effect, supports partial charging without measurable capacity penalty, integrates an internal current‑interrupt/pressure‑relief device for safety, delivers up to 161.45 Wh/kg energy density, and—compared with 18650 cells—fits better in designs with strict diameter and height limits while maintaining a wide operating temperature range.

16500 Battery 1200mAh Specification

Model: 16500

Rated capacity: 1200mAh

Energy: 4.44Wh

Energy Density: 161.45Wh/kg

Minimal Capacity: 1150mAh

Rated voltage: 3.7V

Discharge Cut-off Voltage: 2.75V

Charge Cut-off Voltage: 4.2V

Cycle Life: More than 500 cycles

Dimensions: Φ16*50mm

Weight: 27.5g

Internal Resistance: Less than 55mΩ

Standard Discharge Current: 0.2C (240mA)

Standard Charge Current: 0.2C (240mA)

Max Continuous Discharge Rate: 3C (3.6A)

Max Continuous Charge Current: 1C (1.2A)

Charging Temperature: 0 to 45℃;

Discharge Temperature: -20 to 65℃

Storage Temperature:

  • -20℃~25℃: 12 months
  • -20℃~45℃: 3 months
  • -20℃~60 ℃: 1 month

Key Features – Battery 16500 1200mAh

🔄 No Memory Effect

The cell can be charged at any state of discharge without causing capacity depression. Partial charging does not accelerate aging under standard operating conditions, making it suitable for intermittent-use equipment.

⚡High Energy Density

With gravimetric energy density reaching 161.45 Wh/kg, this cell delivers more usable energy per unit mass than many compact cylindrical alternatives in the same size class.

Compact Design for Space Limited Application

With a smaller diameter and reduced height compared to 18650 cells, the 16500 format enables tighter mechanical layouts in devices with strict size constraints.

🛡️Integrated Safety Vent (CID) 

Each cell includes a current interrupt device (CID). In abnormal conditions such as internal short circuit, severe overcharge, or rapid pressure rise, the CID mechanically disconnects the internal circuit and releases pressure, reducing the risk of thermal runaway.

🌡️Wide Operating Temperature Range 

Designed to operate reliably across a broad temperature window, including low-temperature environments where capacity fade is typically a concern. This makes it suitable for outdoor or semi-industrial applications.

⚠️ Often Overlooked Points & Common Misconceptions

  • “Smaller cell means unsafe” ❌
    Safety is design-dependent. The presence of a CID and controlled internal pressure behavior is more critical than cell size alone.

  • “Any charger works” ❌
    Standard Li-ion CC/CV charging to 4.2V is required. Improper chargers accelerate degradation and bypass safety margins.

  • Ignoring low-temperature charge limits ❄️
    Discharging at low temperature is generally acceptable, but charging below recommended limits increases lithium plating risk.

  • Assuming capacity equals runtime ⏱️
    Actual runtime depends on load current, cutoff voltage, and operating temperature—not capacity alone.

❓ Frequently Asked Questions (FAQ)

Q1: Do cylindrical batteries swell?

Cylindrical batteries do not normally swell during proper operation because their steel casing is designed to contain internal pressure. In abusive conditions such as overcharge or internal short circuits, internal pressure may rise and be released through a safety vent rather than causing visible swelling.

Q2: How to revive a completely dead Li-ion cylindrical battery?

A completely dead Li-ion cylindrical battery is generally not recoverable if its voltage has fallen below the protection cutoff or due to internal damage. Attempting to “revive” it with forced charging is unsafe and not recommended; replacement is the industry-accepted solution.

Q3: Can I replace an 18650 with a 16500 cell?

Electrically possible in some cases, but mechanically and thermally dependent. Capacity and discharge limits must be re-evaluated at the pack level.

Q4: Why is your battery trustable

Cestpower batteries are manufactured under controlled processes with cell-level screening for capacity, internal resistance, and safety mechanisms such as integrated CID pressure relief. Consistent electrochemical performance and built-in protective design make the cells reliable.

Q5: What to do if batteries are defective when received?

If defects are identified upon receipt, discontinue use and isolate the affected batch immediately. Please provide inspection details, test data, and batch information, and we will promptly arrange a replacement.

📞 Call to Action

If you are evaluating 16500 lithium-ion cells for a device or custom battery pack, application context matters more than datasheet numbers alone. Contact our engineering team to review your load profile, thermal constraints, and mechanical limits before final cell selection.

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