Battery Type:Li-ion Voltage:3.7V Capacity:1100mAh Compatible P/N numbers:R2,FMB0829021142,6027A0093901,FLB0920012619 Fit for:TomTom Pro 4000 ,XL335M,XL335S etc Package:Neutral or OEM Safety and Protection: Built-in circuit protection ensures both safety and stability.overheat protection,short circuit protection, overcharge protection etc.