What Are Volts and Milliamp-hours (mAH)?
There are two ratings on every battery: volts and amp-hours (AH). The AH rating may also be given as milliamp-hours (mAH), which are one-thousandth of an amp-hour (for example, 1AH = 1000mAH). The voltage of the new battery should always match the voltage of your original unless the batteries are different chemistries. NiMH and Li-Ion batteries have different voltage ratings, even if they’re for the same device. Some our battery lines will have higher amp-hour ratings than your original battery found in the device. The higher capacity or mAH gives your device longer run-time and will not cause any incompatibilities.