would be interested to know too. I've tried 3rd party battery grips before. Honestly speaking, I'm afraid of the quality. I've had one, the battery cover feels loose, and the whole build feels very plastic-ish. Having a plastic build holding on to my heavy set up and holding it vertically, doesn't give me the security, the weight balance is not right too. End up buying the original Canon battery grip with no regrets.
A kind soul has PM me (Better not to mention the username. Just in case he wants privacy) There's a store is at 2nd floor Excelsior shopping center. They sell 3rd party battery like nice brand called Hercules. Also, their website is Sgcamerastore.com Photography Camera Accessories - (Powered by CubeCart) So just check it out. What they sell on the website is a bit expensive then what you would get if you go to their store. Just went there this afternoon and bought one. Is even has a Warranty for the battery :O Any Question? LOL (I tried 3 building before hitting the Jackpot. Because they have 3 different store within the 3 building which is just sitting side by side...
Hope it helps.
Got different 3rd party batteries from different shops. They all did their job, none gave me any trouble, always charged in the original Canon charger. Capacity was always equal or just slightly lower than the original one, the numbers on the label are always heavily overrated or wishful thinking. Check whether your original battery is chipped. If you get unchipped 3rd party batteries the camera might not show the charge status properly. My sources: MS Color and Orient Photo. Other sources should work as well.
Bro, please try it in video mode, then it will really test how good the battery is. I bought some 3rd party battery. They performance well in normal shooting. However, once you test them in video mode, it is he'll a lot of different as compared with the original one. Hope you try it and give some user feed back.Yeap, the Hercules Brand has their respective battries chipped. Now waiting for my Original Battery drained before trying out the new one
I have 2 3rd party Chromage(chipped) batteries and 1 original Canon battery for my 50D..the original battery has probably 60 charging cycles and is not holding charge very well..without flash max it'll hit 150 shots..as for the 3rd party ones it is into about 15-20 charging cycles and i would say it performs 80% now then when they were new..hitting 500 shots easily without flash..the price of 1 Chromage batt is $25 as compared to $100+ for the original..so to me I will always go for 3rd party ones..it may hit it's end-of-life by 50-60 charging cycles but yet it'll still be cheaper(5x infact) to be using 3rd party as compared to original ones..they can last me well over a year and that is good enough for me!
To be fair 1 of the 2 i bought failed to charge after 5 charging cycles but the retailer offered to exchange a brand new one without any questions asked..so I'm pretty happy!