The battery works but is slightly thicker that the original so those who have skin tight cases (like me) the case no longer fits. I only give it 3 stars because it works but the physical size is too thick.The seller stated "This battery is fully comparable to original manufactured accessories" which is WRONG! It is also 850mA.Better off buying the alternative battery on amazon "Brand New Sprint LG LX-550 LX550 Fusic Standard Lithium-Ion Battery (750mAh)" the reviews are much better. I trusted Amazon to be, at least, correct in their description and they were NOT.