Battery Charger for 11.1V Lithium Ion Batteries with 5V & 9V direct dual USB Mobile Charger - 11.1V-2.5amps, 11.1V-2.5amps Battery Charger for Lithium Ion Batteries with dual USB Lithium Ion & Lithium Ferrous Phosphate Batteries need special electricity adapters or chargers to recharge them due to the difference in technology, cell, and configuration in comparison to standard 12V lead acid or gel batteries. This is a 2.5-ampere battery charger to recharge 11.1 or 12.8V batteries for non-commercial usage or in residential households that buy such batteries for running basic lighting & other loads. It is digitally controlled and comes with various protections to maintain the life cycles of your lithium-based battery. Please ensure that you do not recharge your battery if you're experiencing voltage or surge fluctuations at your premises.