K2 Energy K2B12V19EB 12V 19Ah Lithium Iron Phosphate Battery

I bought this to run a CPAP machine while camping. It successfully ran the machine for three full nights, without recharging, and had perhaps another night's worth of capacity left. The battery is very well made, the screw terminals clear the surface nicely. The BMS automatically cut off charging at 14.4 volts when run off of a 3 amp 16 volt bench power supply. I'm very pleased with the BMS charge and discharge performance. I have not tested whether the over-discharge BMS cutoff works or not because I don't want to risk the cells. I would definitely buy again.