ASPIRE 21700 3.7V Battery
Aspire 21700 Battery (4000mAh)
Aspire 4000 battery is a 21700 battery used for powering vaping mods and other electrical devices. The Aspire 4000 is an INR 4000 mAh battery. Aspire 4000 batteries have been tested extensively and can handle some serious current for long periods of time.