Electrical Power calculator

Calculate power (Watt)

Potential ?12 V (Volt)
Current ?2.08 A (Ampere)A = C/s
Resistance ?5.76 Ω (Ohm)Ω = V / A
Active power ?25 W (Watt)rate of energy transfer / W = V * A

Calculate energy (KWh/Joule)

After 4 days of continuous power usage:

Charge (Ah)200 Ah
Energy (kWh)2.4 KWh
Energy (Joule)8.64 GJ
Energy (Calorie)2.06 Gcal

Calculate capacity (mAh/Wh)

Compare capacity with [AA batteries] [Powerpack] [Phone]

Battery typeWatt-hourempty after
Small powerpack - 2000mAh @ 5V:10 Wh24 minutes
Large powerpack - 10000mAh @ 5V:50 Wh2 hours
Huge powerpack - 15000mAh @ 5V:75 Wh3 hours
Car Battery lead acid 12V - 50Ah @ 12V:600 Wh24 hours
Solar Battery lead acid 12V - 200Ah @ 12V:2400 Wh4 days

References