4000 mah vs 5000 mah

Abbreviated formula: mWh = mAh × V. Example. Suppose you have a smartphone with a 4000 mAh, 3.7V lithium-ion battery. To find your phone's battery capacity in milliwatt hours, you'd multiply the battery's milliamp hours by its voltage: 4000 mAh × 3.7 V = 14800 mWh. Your smartphone's battery stores 14,800 milliwatt hours. That's all there is ... 870 vs 865