2100 mAh (milliampere-hour) is a measure of a battery's electrical charge storage capacity.
In more detail:
- mAh stands for milliampere-hour. It's a unit of electric charge, indicating how much electrical current a battery can supply for one hour. 1 Ampere (A) = 1000 milliAmperes (mA).
- 2100 mAh means the battery can theoretically deliver 2100 milliamperes (2.1 Amperes) of current for one hour. Or, conversely, it could deliver 1050 mA for 2 hours, 700 mA for 3 hours, and so on.
Practical Implications:
- Higher mAh generally means longer battery life. A battery with 2100 mAh will typically power a device for a longer period than a battery with, say, 1500 mAh, assuming all other factors (device power consumption, voltage, etc.) are equal.
- Recharge time. As noted in the Amazon Q&A reference, a slightly larger mAh rating (compared to a lower one) might mean it takes a bit longer to fully recharge the battery. However, the increased usage time often outweighs this slight increase in charging time. The linked reference suggests a difference of around 5%, which is usually negligible.
- It's important to note: The actual battery life you experience can vary significantly depending on how you use your device. Factors like screen brightness, app usage, and network connectivity all impact power consumption.
