How to Check 18650 Battery Health in 2025
Lithium-ion 18650 batteries are extremely common these days. You can find them powering laptops, cordless power tools, electric vehicles, flashlights, vapes, and more. But over time, these batteries slowly lose capacity and efficiency. And improper handling or storage can cause them to fail unexpectedly. That’s why it’s so important to check 18650 battery health. Testing […]