The CCELL M4 is a modern 510-thread battery designed for durability, simplicity, and consistent performance in a compact stainless steel form factor. Built as a next-generation upgrade to earlier CCELL pen-style batteries, it retains a minimalist, button-free experience while improving charging efficiency and overall reliability. Powered by a 290mAh rechargeable battery, the M4 delivers a voltage output of approximately 3.6V, optimized to produce consistent vapor across compatible 510 cartridges. Its inhale-activated system ensures effortless operation, while built-in over-inhale protection helps regulate usage for safety and device longevity. An LED indicator provides feedback on usage and charging status, while USB-C charging ensures faster and more convenient recharging compared to older micro-USB systems. Constructed from stainless steel, the M4 offers a durable and premium-feeling build in a slim, pocket-friendly format. With universal 510-thread compatibility and support for cartridges up to 14mm diameter, it is a dependable battery focused on reliability, ease of use and consistent output without unnecessary complexity.