DC-154 Versatile 12V DC Adaptor for Energy Bar 250 Power Bank Charge your EnergyBar 250 directly from your vehicle or aircrafts lighter socket. For longer-lasting power, you can also use the DC-154 cable to daisy chain two EnergyBar 250s together for twice the charge. Compatible with standard lighter sockets, the EnergyBar 250 and the SunSocket Generator. Output 4 Amps DC Input 12 Volts DC