Just some sharing,

I tried to do some experiment on the battery life. here is my result:

With Garmin Mobile XT installed

- I use for SMS(10-15 sms) and calls(for 10minutes only).
- Keep my phone silent for the whole day during working.
- Full battery at 8am.charge until full bar

Result: Battery level drop to half at 12.00pm, and totally flat when i reach home at 6.30pm

Without Garmin Mobile XT installed

- I use for SMS(30-35 sms) and calls (for 15minutes).
- Not keep my phone silent for the whole day.
- Full battery at 8am.charge until full bar

Result: Batter still full bar at 12.00pm, full bar after office hour at 6.30pm, and still full bar now at 10.35pm

Conclusion: U need to delete Garmin v5.0020 due to poor battery life. and update your firmware by using Apollo software.my version is I8510XEHJ4 and is actually from Russia region. When you update to this firmware, u will not able to change the phone language to Malay and Chinese,but still u can use english. so u choose which one you prefer.

BTW, any recommendation for new GPS software. Mapking got ehem ehem version arrr?