inputs.text: poor battery life - third garmin handheld gps owned previous model gpsmap 76csx pleased purchased 78sc little week ago used land water primary reason purchase use water boat mark coastal fishing spots tampa bay area overall nice unit satellite acquisition fastest ever seen blue chart software city navigator work well unit many option selections within choose color screen vivid rest story say battery life poor would understatement using sanyo nimh enloope rechargeables 78sc also use batteries nikon d300 digital camera wpower winderin nikon batteries give 8001000 shots last weeks enloopes excellent rechargeable battery sold amazon last evening put fully recharged enloopes 78sc morning went use gps batteries 1 4 barstoo low fully light screen fortunately garmin 12 volt cord able use boat not cord gps would uselessthis makes no sense garmin literature states battery life nimh batteries 20 hrs may not experience far \\work around\\ battery issue 1use unit via 12 volt battery boat 2 fully charge batteries night use insert day use really bad resort measures expensive handheld unit see no option return unit imho one case one bad feature really outweighs nice features