Need help in getting step down transformer

[kingofkings86]

Hi, recently just bought:

JNC660 Jump Starter

http://www.amazon.com/gp/product/B000JFJLP6?psc=1&redirect=true&ref_=oh_aui_detailpage_o06_s00

and the cable

http://www.amazon.com/C2G-Cables-Ou...263_img_2?ie=UTF8&refRID=115K4RACWF116TTMRF52

Would like to know which Step down transformer (220V/240V to 110V/120V) to get as I am not sure how to calculate the Wattage. And also where can I buy the transformer?

 

[Gloom me]

Oh my. You bought such a big jump starter to jump start car battery? I never use before but there are much compact jump starters for cars.

Eg:

Anyway, the first place to try is SLT. Something like during the haze period, a lot bought step-down transformer. Like this:

 

[kingofkings86]

Is the 500W transformer enough or should I be getting the 1000W one?

 

[Gloom me]

Is the 500W transformer enough or should I be getting the 1000W one?

Probably can ask the uncles at SLT. But what I think is, the wattage shouldn't matter in your case. Since you're charging the internal battery only.

I may be wrong though. If 500W and 1kW price not much difference, then get the higher wattage one to play safe.

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