3.7V 400mAh wearbale lithium polyme battery FT652530P 
                
                    lithium polyme battery FT652530P with 3.7V 400mAh for headphone charging box, headphones, sound card
                
                
                
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                            Height (mm)30.5
                        
 
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                            Width (mm)25.5
                        
 
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                            Thickness (mm)6.5
                        
 
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                            Internal Impedance (mΩ)180
                        
 
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                            Nominal Capacity (mAh)400
                        
 
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                            Nominal Voltage (V)3.7
                        
 
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                            Weight (g)8.5