Hi, just below are two pictures and details of different mini 6v to 12v step up power inverters. I have tried to use the smallest sized one out of the two without success. I installed the smallest one on my old 50cc moped with the idea that it would charge my mobile phone as I rode my bike. My bike has a 6v electrical system, hence the need for a 6v to 12v power inverter. I also bought a 12v incar charger lead from a phone shop. Its the type of lead you plug into your car cigerette lighter to keep your phone fully charged. It charges my phone well inside my car but not on my bike! On my bike. I connected the phone charger lead to the 6v to 12v step up inverter expecting it to charge my phone just as it would do in my car. But no! It does not charge my phone correctly. It seems to send power to my phone in short spurts and gaps. It will charge for 5 to 8 seconds. It then stops charging for 7 seconds and continues to charge for a further 5 to 8 seconds and the cycle repeats over and over. Having it charge this way means that the phone does not receive a good charge and eventually my phone battery goes low and then dies. I think there could be stability issues with this 6v to 12v power inverter. I have found another type of power inverter for sale. The seller says his inverter is quite stable. I may end up replacing the old inverter with the one. I'm hoping it will do the job more successfully than the current inverter im trying but failing to use. Im not technically minded. I have copied and pasted the web addresses of both inverters. On the sites you will see the technical details of both inverters. Would someone please take a look to compare both devices for me please. I am looking for a solution to charging my phone successfully whilst on my bike. Would the bigger inverter be better compared to the smaller one I have allready installed? This is the inverter I am currently using but doesn't work properly. http://www.ebay.co.uk/itm/350436684000?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2648 And this is the inverter I am thinking of getting to replace the old one. http://www.ebay.co.uk/itm/DC-DC-Converter-Regulator-Step-up-Step-down-2-1-/150657732239?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash;=item2313e68e8f As i said, Im not techinally minded and and looking for your advice. Would the bigger inverter be a good choice to replace the old one to charge my phone. Thanks for replies in advance.