The battery in my Goodmans G Nav 10 won't hold charge.
battery TCL, GPS-374, 3.7v 1300mAh,4.2v (type?)GB/T18287-2000,measures 49mmx31mmx11mm with lead into small black flat circuit board type 6 pin connector,where can I source a replacement & if possible replace with higher capacity?

snapshot, March 2009