# Understand Terminal Battery Performance ### Time for Full Discharge (During Use) The duration for a complete discharge varies depending on how the terminal is used. Below are the estimated discharge times under normal usage conditions, which include constant light mode, default brightness, and 4G usage, starting from a full battery (100%) to shutdown: * Q1V2: Approximately 6 hours * Q2: Approximately 6.5 hours * Q3: Approximately 7.5 hours ### Time for Full Charge (0-100%) When charging the terminal with a 5V2A power supply in constant light mode, the time taken to charge the battery from 0% to 100% is as follows: * Q1V2: Approximately 2.5 hours * Q2: Approximately 2.6 hours * Q3: Approximately 4 hours Important Note: The actual time for discharge and charge may vary depending on the specific model of the terminal and the operating conditions. Battery performance can be influenced by factors such as the age of the battery, environmental conditions, and specific usage patterns. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://smartpossdk.gitbook.io/cloudpossdk/faq/battery-power/understand-terminal-battery-performance.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.