Replacement Battery For: Sony Clie PEG-TJ27, Clie PEG-TJ37, Sony Clie TJ25, TJ35, Clie PEG-T400, PEG-T410, PEG-T415, PEG-T425, PEG-T600, SONY UP553048-A6H 100% Compatible with original battery; 180 days warranty Capacity: 800mAh; Nominal Voltage: 3.7V Battery Type: Li-ion Polymer battery; Safe and reliable battery certified by UL, CE, UN38.3, RoHS Over 300 times cycle life; Long working time