It was time for a new powerbank , having pulled apart my alleged Solar PB I thought I might want a replacement . I have to say these powerbanks are very handy to have around . So I got on Feebay and had a look at what was available . I found this one for $14.99 ozzi bananas and with a claimed capacity of 50,000 mAh ( which I thought a very bold claim ) , how could I possibly pass bye such a deal ? ( Well I did not ) .  

 To test capacity I have a charge doctor that counts current used .  So setting up a action cam to loop video ( Dash cam settings ) I set about using the powerbank much like a hardwire powering a dash camera . So when the PB has no more power and it shuts down so will the camera . Then all I need to do is see how much power the PB fed the action cam . 

  So to the camera went 6530mA  .  Recharging the PB some 8849mA went to fully recharge it .  Actually that's not terrible at all . ( From an efficiency perspective ) .  So obviously we dont have a 50 thousand mAh powerbank !  Now if the seller had claimed 5 thousand mAh I would be horribly impressed . But alas such is not the case . 

 Now we come to the second part . Ports one and two . USB port one is claimed to be regulated @ 1A output and USB port two is said to be 2.1A . To test this I am using some dummy loads to test the current .  Using the 1Amp dummy load both ports gave about 0.92 amps . Switching to the 2A setting both ports gave 1.86 amps . ( Hmmmm )  Switching to a more heavy duty dummy load , I set it for 2.5 amps ..  And yes both USB ports delivered 2.5 amps .  This is some what more than the claimed regulated output ...

  Now what about using both ports at the same time ?  With the 1A dummy load in USB port 2 and the 2.5A dummy load in USB port 1 I got 0.93A from the 1A dummy load and 1.5A from the 2.5A dummy load for a total of almost 2.5A .  Now reversing it .. a 1A dummy load in USB port 1 and a 2.5A load in USB port 2 the PB refused to run .  It was not until I lowered the load from 2.5A to 1.5A that the PB ran ..  Hmmm ..  So looks like a 2.5A safety cut out when both USB ports are active ..  So how high can we go on a single USB port .. I got to 2.58 amp and at 2.6 amp the PB again refused to work .  So there does seem to be some safety built into the PB . ( Over current protection ) Though the claim is 1A and 2.1A which = 3.1A  (?)  Having over current protection is far better than not having any ( that's for sure ) .  Now the first way I tried this  1A in USB2 , 2.5A in USB1 the PB did refuse to run , but I just pushed the dummy load in and out till it started ( 2.5A dummy load ) at 1.5 amp .  ( So it did refuse to run at 2.5A + 1A )


 Conclusion :

  The seller just had to claim 50 thousand mAh (?) , this means that the PB only delivers some 13% of claimed capacity and only stores 17.5% of claimed capacity . Now if the seller had claimed something more reasonable (?) ...   

   Lets over look the claims for a moment and just concentrate on the PB itself . I think it performed rather well for a budget powerbank and what you get for some $15 ozzi bananas is rather good ( value for money ) . If I find any parasitic drain worth mentioning I will do an update to this review . For now I will give this PB 8 out of 10 .  ( Possibly to be amended should there be need )   


  7th January to 14th Feb =  I let the power bank just sit to see how much parasitic drain there might be ..  Well the results are in and all of 377mAh was needed to fully charge the power bank . That's rather good actually .