>係邊度買同買咩型號
SSP Ap Liu Street, Wah Fai, get whatever you like
higher Ah more $$ and more weight
if you want it to charge your Batteries too then get 10Ah or more(=10000mAh, can charge 2x4600mAh)
if only for Starter box 7Ah is more than enough(7Ah is very heavy already)