I'm using Canon 40d with a third party battery grip, I just bought 1 of the third party batteries from one of the cser. In total I have 3 batteries now.
For normal usage, is it advisable to get one more to make it 4? Because the battery grip allows me to use 1 battery to operate. Thus I'm hesitating on whether I should get 1 more battery to make it a pair
Any advise from pros down here?