This 2400 mAh battery will fit in the CS700, CS701, CS710, CS711, CS750, and CS751. The battery that comes with the radio is 1700 mAh.
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It is great to get more mAh but not a much larger battery and the cost was reasonable.
This really extends the radio use between charges , this should be an option when buying the radios , most people would gladly pay extra to have the radio come with this battery......