Hey guys, my brand refurbished battery bank died(circuit board issues) and I needed a proper rechargeable battery bank I have one.... Its dead and I was wondering what would be the based and cheapest way to recharge this bankSPECS:Voltage: 18V(3.6x5)Watt Hours: 46.8Wh(9.36x5)Amp Hours: 13000mAh(2600x5)I'm considering using an old 5V DC power supply but idk if it will charge.