BATTERYType Non-removable Li-Ion 4400 mAh battery. Positioning No. SOUNDLoudspeaker Yes. Audio quality Noise -87.8dB / Crosstalk -83.2dB. Loudspeaker Voice 66dB / Noise 63dB / Ring 66dB. TESTSDisplay Contrast ratio: 896:1 (nominal).
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