18650 means that the diameter is 18 mm, the length is 65 mm, and 0 means a cylindrical battery. Different from the common AA battery, the model is 14500, with a diameter of 14 mm and a length of 50 mm. Generally, 18650 batteries are used more in industry, but few in civilian use. The most common ones are laptop batteries and high-end flashlights. 18650 is only the size of the battery. The 18650, lithium iron phosphate batteries 32700, 32650, 26650, 18650, 14500 are more common, especially 32700 and 32650 and 2665 lithium batteries. NiMH 18650 (rare), the current common 18650 is lithium ion.
Voltage difference:
Lithium iron phosphate (lifepo4) battery voltage: 3.2V
Ternary lithium battery (li-ion) battery voltage: 3.7V
NiMH/NiCr battery Voltage: 1.2V
Lithium-ion batteries have great advantages in terms of weight, volume and capacity compared to the commonly used AA batteries. For example, a 2400MAH 18650 battery, the voltage is calculated according to the standard 3.7V, and the power is 8880MWH. Now the best Sanyo No. 5 rechargeable battery ENELOOP has a capacity of 2000MAH, a voltage of 1.2V, and a power of 2400MWH. It can be seen that a good 18650 The power capacity of the battery is nearly 4 times that of the AA battery.
18650 type lithium battery is a commonly used lithium battery in electronic products. It is often used as a battery cell in notebook computer batteries. The products are widely used in strong light flashlights, PDAs, digital cameras, digital video cameras, instruments, anti-theft devices, and special remote controls. , cordless phones, spare lights, fishing lights, flashlights, emergency lights, LED flashlights, miner's lamps, medical equipment, model aircraft, etc.
1. Use: Due to the large capacity per unit density, it is often used in most notebook batteries. In addition, it is also commonly used in high-end glare flashlights, portable power supplies (mobile phone portable chargers) and so on.
2. Types: 18650 batteries include lithium-ion batteries and nickel-hydrogen batteries. Since nickel-hydrogen batteries are rarely used now, the 18650 batteries are now referred to as 18650 lithium-ion batteries unless otherwise specified.
3. Voltage and capacity specifications: Ni-MH battery voltage is 1.2V, common capacity is 4500MAH, lithium-ion battery voltage is 3.6V-3.7, common capacity is 1500MAH-2600MAH
4. Size: The numbers 18650 represent the appearance size: 18 refers to the battery diameter of 18.0mm, 650 refers to the battery height of 65.0mm. (our ordinary 5th battery, AA battery)
5. The 18650 battery ranges from 1200mah to 2600mah, and even has a standard of 2800 or 3000mah (remind everyone that more than 18650 above 4800mah is not credible, and the false standard is serious) 3.7V refers to the minimum voltage when the battery is exhausted
