Canon G9 country to buy cheaper accessory Korea or Hong Kong

[knight99]

Hi fellow forummer,

re Canon G9, cheaper to get Canon NB-2LH 7.4v Li-on battery pack from
1) Korea(Namdaemun market) or
2) Hong Kong(?)
3) Guanzhou, China(?)

Is it advisable to buy compatible battery instead of original?

I am also thinking about buying Canon flash 220EX to go with G9.

Thanks in advance