There is a difference. The 14500 lithium battery is a lithium battery with a diameter of 14mm and a height of 50mm. AA batteries are the same size as 14,500 batteries, but are usually disposable batteries or nickel-metal hydride nickel-cadmium batteries.
The 14500 lithium battery is a lithium battery with a diameter of 14mm and a height of 50mm. According to the cell material, it is divided into lithium iron phosphate batteries and lithium cobalt oxide batteries. The voltage of the lithium cobalt oxide battery is 3.7V and the voltage of the lithium iron phosphate battery is 3.2V. The voltage can be adjusted to 3.0V via a battery voltage regulator lithium. Since its external dimensions are the same as 5# AA batteries, one 14500 lithium battery and a reserved bucket can be used instead of two AA batteries.
Compared to nickel-hydrur rechargeable batteriese metal, lithium batteries have the advantages of being lightweight, less self-discharge and superior discharge performance. They are therefore widely used by photography enthusiasts in digital cameras and electronic cigarettes. to replace rechargeable nickel-metal hydride batteries.
AA battery (i.e. AA, R6) is one of the types of batteries. Its general size is 14 mm in diameter and 50 mm in height. AA batteries are widely used in many small electrical appliances and digital products due to their small size and moderate capacity.
AA batteries sold in the market today include: nickel metal hydride rechargeable batteries, nickel cadmium rechargeable batteries, zinc manganese alkaline batteries (referred to as "alkaline batteries") ), ordinary zinc and manganese acid batteries (referred to as "ordinary" "Battery") etc. NOTWe can understand the basic performance of AA batteries by the letters on the battery, so we can decide which type of battery to use on which device.
Ordinary batteries
Ordinary batteries are zinc-manganese batteries, and the voltage of each battery is 1.5V. There are three main types of ordinary batteries: ① Normal mode, the marked model is Wei6 or R6S; ② High capacity battery, the marked model is R6C ③ Zinc chloride high power type, the marked model is R6P; The advantage of the R6P is its large capacity, close to that of alkaline batteries. There is a small group of AM3/UM3, called alkaline and carbon
Alkaline Battery
Alkaline battery logo model is LR6, unique. the battery voltage is 1.5V. It is characterized by large capacity, generally 2-6 times that of ordinary batteries, and can discharge at high current. It is suitable for electrical appliancesdevices requiring high currents such as radio recorders and flashlights.
Rechargeable battery
The voltage of a single battery is 1.1 or 1.2 V. Nickel-cadmium batteries marked NICKEL-CADMlIUM on the battery are nickel-cadmium batteries marked NICKEL METAL HYDRIDE (or NI-MH). The rechargeable battery can be charged and discharged 500-1500 times and can be discharged with a large current. The internal resistance does not change much at the time of discharge, and the internal resistance does not increase sharply until the end of the discharge.
Ni-MH batteries have no memory and currently have a maximum capacity of 2700 mAh, so they are better than nickel-cadmium batteries in terms of economy and excellent battery protection. environment.With the characteristics of high battery life and high performance, it will gradually replace alkaline batteries and nickel batteriesel-cadmium.
Reference Materials
AA Battery_Baidu Encyclopedia
Lithium batteries generally have a voltage of around 4.2 V when charged fully charged, but yours is only 4.05 when fully charged V. , this should not be a problem with the battery itself, but a problem with the charging circuit.
Also, if it is a battery with a protection plate, the protection plate will have a voltage drop, and this part must also be taken into account.