Ultralife 7.2V 2.4Ah Li-Ion Rechargeable 2S1P Battery with wire Leads The UBBL20-FL is a 7.2V 2.4Ah rechargeable Lithium ion battery which can quickly be integrated into a wide range of electronic devices. The battery comprises two 18650 cells in a 2-series, 1-parallel configuration. An integrated battery management system (BMS) provides protection against over-charge, over-discharge, over-current and short-circuit. The UBBL20-FL meets UN transportation testing requirements. The UBBL20-FL is terminated with flying leads which allows the customer to implement their own final connection solution.