Fast Charge and Long Working Time: Just need 3H to full charge the battery, and it can use up to 8H to72H. ItÃ¢â‚¬â„¢s service life up to 3 years. | Afety Protection: over-charge, over-discharge, over-current & short-circuit protection | No Memory Effect: you can use it any time and no need to discharge it fully then start to use. And it can keep 80% power after 1 year of placement. | 1000mAh High Capacity: The 3.7V rechargeable battery is perfect for your original batteries, such as replace 3.6V AA NiMH battery and 3 x AA Alkaline battery. | [Compatible ] :It is recommended to use in an open area. ItÃ¢â‚¬â„¢s compatible for Floureon walkie talkie M880, FC200, XF628 and some of the other walkie-talkies that require 3*AA batteries.