38.5% more mAH battery than OptimaSmart OPS-51. More battery capacity reduces the need to charge your battery again. (1800 mAH, Li-Po vs. 1300 mAH, Li-Po)
60.0% more mega pixels (MP) on main camera than OptimaSmart OPS-51. More main camera resolution means better picture quality and detailed photos, which will look sharp on a large screen. (3.20 MP vs. 2 MP)
14.3% bigger screen size than OptimaSmart OPS-51. The bigger the screen size is better the user experience of reading and watching movie or video songs. (4 Inch vs. 3.50 Inch)
41.2% Higher pixel density than OptimaSmart OPS-51. High pixel density shows sharper text and extremely detailed photos and videos. (233 ppi vs. 165 ppi)
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