This is a generic, equivalent one, 100% compatible. This 3.7V 1000mAh Replacement Li-ion battery is designed to compatible with TomTom CSTG800SL 4ER51 4ER5.001.01 4EH52 4EH51.

Specifications:
* Product Type: generic/equivalent
* Battery Voltage: 3.7V
* Battery Capacity: 1000mAh
* Chemistry: Li-ion
* Dimension: 43.80 x 35.80 x 6.70mm
* Condition: new, 1 Year Warranty!

Compatible with the following Part Number:
CS-TMG800SL, CSTG800SL, AHL03711022

This battery is compatible with the following TomTom GPS units:
TomTom Go 820
TomTom Go Live 820
TomTom G0 825
Tom Tom Go Live 825
4ER51
4ER5.001.01
4EH52
4EH51
4EH45
4EJ51
4EJ41
4ER41
4ER5

Package Included:
1 x 3.7V 1000mAh Replacement Battery for TomTom CSTG800SL 4ER51 4ER5.001.01 4EH52 4EH51