Why are you not using the OEM?
I usually find that when I'm faced with such choices, the OEM is the best bet. Part # is BATT-MX-980 and URC has them in-stock.

If you are just wanting to be dirt cheap and refuse to pay more than $30+ for a battery; there are 2 problems with that. Even if you can find a replacement battery that worked well for $6.99, there is no guarantee the next time you ordered it you would get the same. Those bottom feeding vendors come & go.
I personally have never found 'any' of the bottom feeder supply to be worth crap. They routinely use low binned parts they get for pennies, to create their cheap product. So no surprise it is suspect at best.