The term **7AN-R** typically refers to a high-capacity, rechargeable lithium-ion battery cell, specifically the **18650 7AN-R**. These are industrial-grade components often used in high-drain devices, power tools, and custom battery packs. Below is an overview of its specifications, internal chemistry, and common applications. --- ## 1. Technical Specifications The "7AN-R" designation usually points to a cell with a capacity of approximately **2500mAh to 2600mAh**. | Feature | Specification (Typical) | | :--- | :--- | | **Cell Format** | 18650 (18mm diameter, 65mm length) | | **Chemistry** | LiNiMnCoO2 (INR/NMC) | | **Nominal Voltage** | 3.6V - 3.7V | | **Max Charge Voltage** | 4.2V | | **Discharge Cut-off** | 2.5V | | **Continuous Discharge** | ~20A - 25A (High Drain) | | **Cycle Life** | 300 - 500 Cycles | --- ## 2. Key Electronic Characteristics ### A. High Discharge Current (C-Rating) The "R" in many battery nomenclatures (like 25R or 7AN-R) signifies a **high-rate** discharge capability. This means the internal resistance is low, allowing the cell to provide high bursts of energy without overheating. ### B. Chemistry: INR (Lithium Manganese Nickel) These cells use a hybrid chemistry that combines the safety of Manganese with the high energy density of Nickel. This makes the 7AN-R stable for use in handheld electronics that require significant power. ### C. Protection Circuitry * **Unprotected (Flat Top):** Most 7AN-R cells are sold as "bare" cells. They do not have a built-in Protection Circuit Board (PCB). * **External BMS Requirement:** Because they lack internal protection against overcharging or short-circuiting, they must be used with a Battery Management System (BMS) when integrated into devices. --- ## 3. Common Applications Due to their high current output, these parts are rarely used in low-power remotes and are instead found in: 1. **Power Tools:** Cordless drills, saws, and grinders. 2. **Electric Mobility:** E-bike battery packs and electric scooters. 3. **Vaping Devices:** High-wattage electronic cigarettes. 4. **Vacuum Cleaners:** Modern cordless stick vacuums (e.g., Dyson-style replacements). --- ## 4. Safety Warning > [!CAUTION] > Handling 18650 cells like the 7AN-R requires caution. If the outer plastic "wrap" is torn, it can cause a short circuit. Always ensure the insulation is intact and never carry loose cells in a pocket with metal objects (keys/coins).