Calculator Form
Example Data Table
| Resistance | Voltage | Wattage | Current | Use Case |
|---|---|---|---|---|
| 1.50 Ω | 3.20 V | 6.83 W | 2.13 A | Lower power setting |
| 1.20 Ω | 3.40 V | 9.63 W | 2.83 A | Balanced setting |
| 1.00 Ω | 3.60 V | 12.96 W | 3.60 A | Higher output setting |
Formula Used
Wattage: P = V² ÷ R
Current: I = V ÷ R
Recommended Voltage: V = √(P × R)
Battery Energy: Wh = (mAh ÷ 1000) × nominal voltage × efficiency
Energy Per Puff: Wh per puff = watts × seconds ÷ 3600
Estimated Puffs: usable battery Wh ÷ Wh per puff
Checked Voltage Limit: lower value of current limit voltage and wattage limit voltage
How to Use This Calculator
- Enter the cartridge resistance printed by the maker.
- Choose entered voltage or recommended voltage mode.
- Add target watts, capacity, current limit, and efficiency.
- Enter puff length and expected daily puff count.
- Press calculate to view power, current, and runtime.
- Use CSV or PDF buttons to save the result.
This tool estimates electrical behavior only. Follow device instructions, cartridge ratings, and local rules.
Battery Settings Guide
Why Settings Matter
A cartridge battery is a small electrical power source. Its setting changes voltage. That voltage changes power through the cartridge resistance. More voltage creates more wattage. More wattage also draws more current from the cell. This calculator connects those values in one place. It helps you see the electrical load before choosing a setting.
Understanding Resistance
Resistance is measured in ohms. A lower resistance draws more current at the same voltage. A higher resistance draws less current. The number may be printed on the cartridge package or device screen. Use the maker value when possible. Guessing resistance can give weak results. It can also hide overload risk.
Voltage and Wattage
Voltage is the battery output setting. Wattage is the heating power made at the cartridge. The calculator uses Ohm law to convert voltage into watts and amps. It can also reverse the formula. That means you can enter a target wattage and find a matching voltage. The voltage is rounded to your chosen step.
Battery Runtime
Runtime depends on capacity, cell voltage, efficiency, wattage, and puff length. A larger mAh number usually stores more energy. Yet efficiency losses reduce usable energy. Long puffs use more energy than short puffs. High wattage also drains faster. The estimated puff count is useful for planning charging intervals.
Safety Checks
Every battery has limits. Every cartridge also has limits. This page checks current, wattage, and voltage against the numbers you enter. It does not replace maker instructions. It is an electrical estimate. Reduce settings when current or wattage is high. Stop using damaged batteries, hot batteries, or swollen cells.
Best Practice
Start with conservative values. Increase settings slowly. Watch current draw and heat index. Keep the battery clean and dry. Charge with the correct charger. Store cells away from metal objects. Replace worn parts. A simple calculation can prevent poor performance and reduce avoidable electrical stress.
FAQs
What does this calculator measure?
It estimates voltage, watts, amps, runtime, puff count, and limit checks. It uses resistance, battery capacity, efficiency, puff length, and entered safety limits.
What resistance value should I enter?
Use the resistance printed by the cartridge maker. If the device reads resistance, you may use that value. Avoid guessing when safety checks matter.
How is wattage calculated?
Wattage is calculated with P = V² ÷ R. Voltage is squared, then divided by resistance. This shows heating power in watts.
How is current draw calculated?
Current draw is calculated with I = V ÷ R. Higher voltage or lower resistance increases current. Compare the result with the battery limit.
Why does runtime change so much?
Runtime changes because wattage, puff length, battery size, and efficiency all affect energy use. Higher wattage and longer puffs drain faster.
What is the checked voltage limit?
It is the lower limit found from current and cartridge wattage rules. Staying below it helps keep the entered electrical limits respected.
Can I export the calculation?
Yes. Use the CSV button for spreadsheet records. Use the PDF button for a simple report that stores the main result values.
Is this a replacement for maker instructions?
No. This is an electrical estimate. Always follow device labels, cartridge ratings, charger instructions, and applicable local rules.