You have become the owner of the wireless device running with AA batteries.What is the best choice for your device, rechargeable battery or disposable battery?Here are some of the facts you may want to consider when making a decision.Rechargeable AA NiMH batteries are typically used for high-grade drainage such as wireless microphones, cordless phones, golf/terrain GPS devices and digital cameras.The initial cost of AA NiMH rechargeable batteries is usually higher-Time of Use of AA battery (one time ).However, if you take into account the cost of the charger plus the hundreds of times rechargeable batteries that can be used, it is much more cost-effective than buying a disposable battery.The use of rechargeable batteries can also reduce waste generated in the environment.The capacity of the rechargeable AA NiMH battery is different in milliliter hours (mAh.The higher the MAh rating, the more power the battery can store, so the longer it lasts.Before purchasing, please refer to the user manual of the device for the minimum mAh capacity level requirements.2000 to 2700 mA of the AA rechargeable battery of the Ascend sweetspot battery.The rated capacity of AA rechargeable batteries does not exceed 2000 mAh.When the rated capacity of AA rechargeable batteries exceeds 2500, it can be considered suspicious at most.When purchasing a rechargeable AA NiMH battery, The mAh capacity rating should be indicated in the package (and/or the battery itself.Please note that while some manufacturers claim that their battery rated capacity is particularly high, fine prints may indicate that the battery is also rated at the lowest.Usage in the real world tends to show that the minimum capacity rating of the battery is more realistic than the higher capacity rating.Finally, it should be noted that the nominal voltage of AA disposable battery and AA rechargeable battery.The rated capacity of disposable AA alkaline batteries is 1.5 volts.This is the actual voltage at the first purchase/full charge.When the alkaline battery starts to discharge, the voltage drops continuously, with an average of 1.2 volts.In the end, the AA alkaline battery will be reduced to less than 1.0 volts.However, the nominal value of the rechargeable AA NiMH battery is 1.2 volts when fully charged, can keep 1 volt.2 volts until almost complete discharge.Understanding the difference between a rechargeable AA NiMH battery and a standard disposable AA battery helps you do a better job and make a smarter decision on which type of battery is best suited to your own situation and the needs of a specific device