I bought a jump start pack 24Ah from super cheap...its the biggest jump park on the market I think......not sure how long the charge will last but I haven't had to charge it for the second time yet....
Like said previoulsy get a sealed battery maintenance free or gel cell....much less to worry about....the more AH = AMP HOUR means the longer the charge will last.....still has the same output 12 volt.
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