Built with up to 1500 mAh Li-ion battery, these walkie-talkies can keep running for up to 8 hours each. Moreover, thanks to their 50 CTCSS/105 CDCSS encryption modes, these walkie-talkies can keep your data safe. With up to 1500 mAh Li-ion battery, these walkie-talkies can last for up to 8 hours each.