Xiaolu Battery Blog

  Battery Dimensions and Design   The 21700 and 18650 refer to battery types differentiated by their dimensions. The 18650 battery measures 18mm in diameter and 65mm in length, while the larger 21700 battery is 21mm in diameter and 70mm in length. These slight differences affect compatibility with devices, as the 21700 is often used in larger applications or newer technology models.   What Are 21700 Batteries?   The term " 21700 battery " refers to a rechargeable lithium-ion cell with a 21 mm diameter and 70 mm length, similar to the way the 18650 cell is named. As more electronic devices move toward lithium-ion power sources, this size gained popularity, particularly in electric vehicles like Tesla cars and electric scooters.   - 21700 battery is short-hand for a rechargeable, lithium ion battery that is 21 mm in diameter and 70 mm long. - The big advantage of a 21700 battery over an 18650 battery is the overall energy capacity possible. - 21700 batteries are a...

 When discussing lithium-ion batteries, two major players stand out: Lithium Iron Phosphate (LFP) and Nickel Manganese Cobalt (NMC). Both have established strong footholds in various industries, but the question remains—which one offers the best performance for your needs?   What Are LFP and NMC Batteries?   LFP Batteries:   LFP batteries  utilize lithium iron phosphate as the cathode material, delivering a steady voltage of approximately 3.2V. They are increasingly popular in household energy storage systems and solar installations, largely due to their high safety rating and long cycle life.   NMC Batteries:   NMC batteries  feature a cathode blend of nickel, cobalt, and manganese, paired with a graphite anode. These batteries typically offer a higher voltage, around 3.7V, making them particularly well-suited for electric vehicles (EVs), with companies like Tesla and BYD favoring NMC for their energy density and performance in automotive applica...