Polymer Li-Ion Cell: 3.7V 500 mAh (403144, 1.85Wh, 1.0A rate) –

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Chemistry	Li-polymer 403114 cell 3.7V
Capacity	Nominal:  500mAh  1.85Wh
Cycle life	> 500 times@1C; 800 times@0.5C; 1000 times@0.2C
Charging rate	0.5 A Max.  (1.0C rate)
Discharging Rate	Peak 1A (2.0 C rate); Constant 0.5A (1C )
Dimension(LxWxH) with	40.0mm(1.6″) x 31.0mm(1.2″) x 4.4mm(0.2″)  tolerance +/- 1 mm
Weight	0.4oz (10g)
Suggest	It’s bared single cell No safety PCM built in