600mah compact battery pack for fitness trackers

{"cid":"91223443","title":"Compact 3.7V 600mAh Li-Polymer Battery Pack for Bluetooth Headsets & Fitness Trackers","imgUrl":"https:\/\/img.chinax.com\/nimg\/3a\/bf\/6d45049c6bae80c3d707f0a6a73b-200x200-1.jpg","attrs":{"Brand Name":"BAKTH \/ Neutral \/ OEM","Model Number":"LP-502648-1S-3M","Minimum Order Quantity":"2 Piece","Delivery Time":"35~45 days","Place of Origin":"Dongguan China","Payment Terms":"T\/T","Supply Ability":"1000PCS\/Month","Packaging Details":"1pc\/individual","Type":"Li-po Battery","Model NO.":"LP-502648-1S-3M","Nominal Voltage":"3.7V","Nominal Capacity":"600 mAh","Power Capacity":"2.22 Wh","Max. charging voltage":"4.2V","Discharge Cut-off voltage":"2.8V","Dimension":"Approx 6.0*26.5*51(mm)","Weight":"Approx 12g","Sample":"Available"}}

{"cid":"91221281","title":"600mAh Custom Silver Li ion Battery \/ 851838 3.7V Wearing Device Lithium ion Polymer Battery","imgUrl":"https:\/\/img.chinax.com\/nimg\/7f\/06\/7cbfdb5da1671103eb8a18d5a40e-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"UNEMETECH","Model Number":"UNM851838","Minimum Order Quantity":"5000PCS","Delivery Time":"7-35 days","Certification":"UN38.3, MSDS, CE, CB, IEC62133, PSE, KC, UL1642...","Place of Origin":"Guangdong, China","Payment Terms":"T\/T , WorldFirst , Payoneer , PingPong , Paypal , Alipay , Western Union , ...","Supply Ability":"20000 Piece\/Pieces Per Day","Packaging Details":"Inner Tray + Inner Box + Outer Carton","Type":"Lithium ion Polymer Battery","Nominal Voltage":"3.7V","Nominal Capacity":"600mAh","Discharge Voltage":"3.0V","Max Charge\/Discharge Current":"1.0C\/600mA","Battery Cell Dimension":"Max 8.5*18.7*40.3mm","Battery Weight":"About 9.5g","Cycle Life":"Over 500 times","Warranty":"1 Year"}}