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
Rechargeable AA Li-ion - 800mAh @ 3.6V:2.88 Wh6.9 minutes
Non-rechargeable AA Zinc-Carbon - 900mAh @ 1.5V:1.35 Wh3.2 minutes
Rechargeable AA NiCd - 1000mAh @ 1.2V:1.2 Wh2.9 minutes
Non-rechargeable AA Zinc-Chloride - 1500mAh @ 1.5V:2.25 Wh5.4 minutes
Rechargeable AA NiZn - 1800mAh @ 1.6V:2.88 Wh6.9 minutes
Rechargeable AA NiMH - 2850mAh @ 1.2V:3.42 Wh8.2 minutes
Non-rechargeable AA Alkaline - 3000mAh @ 1.5V:4.5 Wh10.8 minutes

References