6V 4000mAh A-size ER18505 cylindrical primary lithium battery for plc backup, smart metering, Security System, RFID/IoT System, Wireless Transmitting for Smart Home Devices or Military Devices, Shipping container tracking, GPS trackers, smart mobility security solutions for riders. . search background and rich practical experience. Prismatic cells,on the other hand,offer higher energy density per uni,which suits applications requiring fewer cells s like Tesla. . Lithium batteries offer 3–5 times the energy density of lead-acid batteries. This means more energy storage in a smaller, lighter package—perfect for integrated or pole-mounted solar streetlights. [pdf] A 21700 battery is a type of lithium-ion rechargeable cell. 5C=1650mA constant current (CC) charge to 3. The cell impedance shall be. . Designed for UPS applications, ensuring reliable backup power with optimized quick response and sustained power delivery, perfect for emergency power backup systems in Bahrain. Engineered for extended durability, ideal for long-term use with advanced materials that enhance their lifespan, reducing. . Cylindrical lithium-ion batteries are categorized into steel-case and pouch-type designs. Representative steel-case models include 18650 and 21700, while pouch-type models include 09500, 21350, and 18650.