4 x Pieces LiFePO4 Nano-Phosphate A123 ANR26650M1A Genuine Cell (UP to 60C!!) [Nominal capacity and voltage] 2.3 Ah, 3.3 V [Internal impedance (1kHz AC)] 8 m typical [Internal resistance (10A, 1s DC)] 10 m typical [Recommended standard charge method] 3A to 3.6V CCCV, 45 min [Recommended fast charge current] 10A to 3.6V CCCV, 15 min