100.0% more mAH battery than OptimaSmart OPS-51. More battery capacity reduces the need to charge your battery again. (1800 mAH, Li-Po vs. 900 mAH, Li-ion)
3.0 mm Thinner than OptimaSmart OPS-51. Slim mobile phone is easy to handle and looks gorgeous in hand. (124.9 x 65.6 x 10.8 mm vs. 108 x 46.3 x 13.8 mm)
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