Improved heat sink and charging capabilities GS450-GS550-GS650-GS750-GS850-GS1100
Improved heat sink and charging capabilitiesGS400-GS450-GS650-GS250-GS425-GS850-GS1000-GS1100-GS400-GS550-GS750
Resistant to 200 degrees Celsius GS450S-GS550-GS650-GS750-GS850
Resistant to 200 degrees Celsius GS250-GS300L-GSGS400--GS425-GS550