To find out if your battery is almost empty, there are several ways to check the charge status. Here are some methods you can use:

1. Battery Indicator: Many devices and vehicles have a built-in battery indicator, such as a battery icon on a display or an LED light. This indicator typically shows the current charge status of the battery, for instance, using bars or percentages.

2. Measuring Voltage: You can measure the voltage of the battery with a voltmeter or a multimeter. Consult your battery's specifications or the device manual to determine what voltage is considered "empty." A significant drop in voltage can indicate an almost empty battery.

3. Device Performance: If the battery is almost empty, the device may perform less efficiently than usual. For example, you might notice that the speed of an electric scooter or the power of an electric tool decreases. This can indicate that the battery is almost empty.

4. Charging Time: If you regularly charge the battery, you can get an idea of the usual charging time. If the charging time becomes significantly shorter, it may indicate that the battery is almost empty and has less capacity to hold a charge.

It's important to note that the precise way the charge status is indicated can vary depending on the type of battery and the device in which it is used. Always consult the manual or the manufacturer's instructions of the battery or device for specific information on checking the charge status and interpreting the results.